***Warm-up Archives***
8th Grade Science
8/15/12 1) What 3 things should be written at the start of class without being told?
2) How much talking is allowed at the start of class? 8/16/12 1) What needs to be done before the tardy bell rings?
2) List the 5 sections that need to be in your 3-ring folder.

8/20/12 1) Think of some experiments you've done in past years. List some steps that are common to every experiment. 8/21/12 1) What is a hypothesis?
2) Does it matter if your hypothesis turns out to be incorrect? Explain.

8/22/12 1) What are some resources you can use to "gather information" before doing an experiment? 2) When should you write a conclusion? 8/23/12 1) Describe some ways that you can record the result of an experiment. 8/24/12 1) Use dimensional analysis to find the number of years in 6832800 minutes.

Week 3:
8/27/12 1) Convert by moving the decimal point: a) 321.4 dm = _____mm b) 43.75 cm = ____hm 2) Why can't you just move the decimal point with time conversions?
8/28/12 1) Convert a) 750 mm = ______ km b) .0048 dkm = _______ cm c) 100.4 dg = _______ g
8/29/12  1)  What units (mm, cm, m, or km)would be best to measure the following?
             a)  length of your finger
             b)  thickness of a penny
             c)  distance to downtown los angeles
             d)  distance across the classroom
8/30/12 1) What units (mL, L, or kL) would be best to measure the following? a) water in a pool b) soda can c) bucket of water
Week 4:
9/4/12 1) In this class, we will measure things using the ________ system. 2) When using a ruler, we will never measure with the ________ side.

9/5/12 1) List 3 possible explanations why Diet Coke floats in water while regular Coke sinks. 9/6/12 1) If all the following were placed in a graduated cylinder, draw what would happen: Object Density water 1.0 plastic 1.16 wood 0.7 bead .95 oil .925 glycerin 1.26 marble 2.4

9/7/12 1) Density = ? 2) Units for solids will be g/cm3, but liquids should be ________.
Week 5:
9/10/12 1) If 2 objects are the same size, the one with the greater _________ will be denser. 2) Why does oil float above water?

9/11/12 1) Steel has a greater density than water, yet a steel boat floats. Explain.

9/12/12 1) Draw the forces on a boat.
2) Which force must be larger? (boat is sinking) 9/13/12 1) The buoyant force is equal to the weight of the fluid ___________.
2) If the buoyant force is greater than the weight, an object will ____________.

9/14/12 1) Which boat has the larger buoyant force?
<<picture of 2 boats with different amounts of fluid displaced>>

Week 6
9/18/12 1) Explain why a person can lie down on a "bed of nails" without getting injured.

9/19/12 1) Why can't a scuba diver survive thousands of feet underwater?
2) If a force is exerted on a small area, the pressure will be ___________.

9/20/12 1) What would happen to an unopened bag of chips taken to the top of Mount Everest? Explain.
2) Find Pressure if F=63 N and A=3 m^2

9/21/12 1) At the bottom of a mountain, there is higher air pressure because ________________.
2) Find Pressure if F=48 N and A=8 m^2

Week 7
9/25/12 1) Las Vegas is 280 miles away. How fast must one drive to get there in 4 hours?
2) Label the coordinates of each point: <<picture of a graph with points at (0,0), (2,20), and (4,40) 9/27/12 1) The slope of a distance vs. time graph is _________.
2) Find the slope of the graph: <<picture of a graph with points at (0,0), (2,40), (4,80), and (6,120) 9/28/12 1) A runner travels at 8 km/h for 180 minutes. How far did he/she run?

Week 8

10/1/12 1) A bus's maximum speed is 120 km/h. Is it possible for the bus to travel 730 km in 6 hours? Explain.

10/2/12 1) Johnny walks at a speed of 2.5 m/s. If his next class is 800 m away, will he make it there on time?

10/3/12 1) A car accelerates when getting on and off the freeway. Define acceleration.
2) Find the average speed.
<<picture of a graph with points at (0,0), (2,100), and (4,200)

10/4/12 1) Give an example of each of the 3 types of acceleration.

10/5/12 1) A car travels north at 60 miles/hr for 10 minutes. Is the car accelerating? Explain.

Week 9

10/8/12 1) You are in a car going 60 miles per hour. You throw a ball in the air in front of you. Does it hit you in the face? Explain. 10/9/12 1) Net force? Balanced or unbalanced?
a) 8 N right, 17 N left
b) 13 N right, 6 N left, 7 N left
c) 16 N right, 9 N right, 4 N left, 7 N left

10/10/12 1) Newton's 2nd Law states that Force = ______ x _______
2) When forces are ___________, you will have a change in velocity.

10/11/12 1) A soccer ball is rolled with the same force on notebook paper, napkins, and sandpaper. On which surface will the ball
roll the furthest? Explain.

10/12/12 1) Describe the difference between kinetic and static friction.

Week 10
10/15/12 1) Label all forces in the diagram.
<<picture of a boat moving to the right>>

10/16/12 1) Label all forces in the diagram.
<<picture of a car going up a hill>>

10/17/12 1) Label all forces in the diagram.
<<picture of a shoe being pulled with a spring scale>>

10/19/12 1) Label all forces in the diagram.
<<picture of a hangman>>

Week 11
10/22/12 1) Momemtum = _______ x ________
2) Find the momemtum of a 140 kg boy running 3 m/s

10/23/12 1) Newton's 3rd Law states that for every _________, there is an equal and opposite ___________.

10/24/12 1) An object that is not moving always has a momentum of _________.
2) The Law of __________ says that the total momentum before and after a collision is _________.

10/25/12 1) Describe and give 2 examples of elastic collisions.

10/26/12 1) Describe and give 2 examples of inelastic collisions.

Week 12
10/29/12 1) Label all forces in the diagram.
<<picture of a student sleeping on his desk>>

10/30/12 1) List 3 things that have energy and why you believe so.

10/31/12 1) Make a t-chart to identify differences between kinetic and potential energy.

11/1/12 1) Energy from food/drink that is unused gets stored in the body as ______.
2) What type of energy is in food/drink?

11/2/12 1) Chemical potential _________ from the nut is transferred to the _____________ which we measure using a ___________________.

Week 13
11/5/12 1) Gravitational potential energy, kinetic energy, both, or none?
a) a pencil on the ground
b) a thrown baseball
c) a rock on the edge of a cliff
d) a bowling ball rolling

11/6/12 1) The law of _________ of energy states that energy cannot be created or _____________. It can only be ________ from one form
to another.
2) A basketball is held 2 meters in the air and dropped to the floor. Eventually it stops bouncing and has no energy. Where
did the energy go?

11/7/12 1) List 3 things that you know or have heard about global warming.

11/8/12 1) Explain how global warming could result in some species going extinct.

11/9/12 1) List 4 things that can be done to help solve the global warming problem.

Week 14
11/13/12 1) Label the diagram showing where there would be PE, KE, and both.
<<picture of a roller coaster with 4 parts of the track to label>>

11/14/12 1) Describe the features of a good roller coaster. (use the terms PE, KE, rolling friction, air resistance)

11/15/12 1) Explain how you can find the PE at the start of a roller coaster
2) Explain how you can find the KE at the end of a roller coaster.

11/16/12 1) Calculate the gravitational PE of a 400 kg roller coaster that is at the top of a 40 m hill.

Week 15
11/26/12 1) How will you find the velocity of the marble at the end of the roller coaster?

11/27/12 1) List some similarities and differences between a cup of water, an ice cube, and steam.

11/28/12 1) Give 3 examples of each of the states of matter.

11/29/12 1) Draw the change of state graph, labeling all stages.

11/30/12 1) Draw the arrangement of particles in a solid, liquid, & gas.

Week 16
12/3/12 1) Complete the change of state graph for dry ice.

12/4/12 1) What happens to the temperature while a substance undergoes a change of state?

12/5/12 1) 0 C is the melting point of water. 0 C is also called the _______ point.

12/6/12 1) 100 C is the boiling point of water. It is also the temperature that water vapor __________.

12/7/12 1) A pure substance that cannot be separated into simpler substances is called an ____________.
2) Some examples include oxygen, _________, __________, & __________.

Week 17
12/10/12 1) Compound or mixture?
a) water
b) sandwich
c) deck of playing cards
d) table salt

12/11/12 1) Chlorine is dissolved in a swimming pool. What is the solute? Solvent?

12/12/12 1) Last year, you learned that all living things are made of ________.
2) All things, living or non, are made of ___________.

12/13/12 1) How many protons, neutrons, and electrons does iron (Fe) have?

12/14/12 1) The ______ table lists all the known ________ in the universe.
2) Particles that orbit the nucleus are the negatively charged __________.

Week 18
1/7/13 1) Find the number of protons , neutrons, and electrons for calcium (Ca).

1/8/13 1) Find the number of protons , neutrons, and electrons for Hydrogen (H).

1/9/13 1) Find the number of protons, neutrons, and electrons for gold (Au).

1/10/13 1) Look at the diagram of the electron orbital diagram. What element does it represent?

<<diagram of an electron orbital diagram for Ar>>

1/11/13 1) Look at the diagram of the electron orbital diagram. What element does it represent?

<<diagram of an electron orbital diagram for O>>

Week 19
1/14/13 1) Which element?
a) metalloid in period 3
b) period 2 with 6 valence electrons
c) 4 protons and 5 neutrons

1/15/13 1) What is a procedure and why is it important?

1/16/13 1) Draw a Lewis Dot structure for Be and Mg (both from group 2). What can you conclude about the relationship between valence
electrons and group #?

1/17/13 1) Draw a Lewis Dot structure. What do these atoms want?
a) S b) F c) Li d)Ca

1/18/13 1) Show how Mg and O will form an ionic bond.

Week 20
1/22/13 1) Look at the Lewis Dot structures for Carbon and Oxygen. Could carbon monoxide (CO) be formed by an ionic bond? Explain.

1/23/13 1) Draw the Lewis Dot structure for carbon dioxide.
2) Make the model for carbon dioxide.

1/24/13 1) Draw the Lewis Dot structure for water.
2) Make the model for water.

1/25/13 1) Oppositely charged ions can form an __________ bond. __________ bonds form when electrons are shared.

Week 21
1/28/13 1) A 2H2 + O2 ----> 2H2O
B raisins + m&m's + nuts ----> trail mix
A is a chemical reaction, but B is not. explain why

1/29/13 1) Give 2 examples of a physical change and 2 examples of a chemical change

1/30/13 1) Endothermic or exothermic reaction?
a) burning candle
b) glow stick
c) cold pack
d) photosynthesis
e) fireworks exploding

1/31/13 1) List the 5 indicators of a chemical reaction.
2) Do they always indicate a chemical reaction?

2/1/13 1) What happens to bonds when a chemical reaction occurs?

Week 22
2/4/13 1) First the penny will be coated with zinc to make it look ________. Then it will be _______ to make the copper and zinc bond to form _________.

2/5/13 1) How many oxygen atoms?
a) H2O
b) 3H2O
c) CO2
d) Zn(NO3)2

2/6/13 1) Substances you start with are called __________ and substances that are made are called _________.
2) How many hydrogen atoms?
a) 3NaOH
b) 2C2H5OH

2/8/13 1) Why must a chemical equation always be balanced?
2) Balance the equation: H2 + O2 ---> H2O

Week 23
2/11/13 1) Balance the equations: H2SO4 + NaOH --> H2O + Na2SO4
H2O + CO2 --> H2CO3

2/12/13 1) Complete the chart:
Red Litmus Paper Blue Litmus Paper

2/13/13 1) Make a Venn diagram that describes some similaritites and differences between acids and bases

2/14/13 1) Acids taste sour and bases taste bitter. Why would that be a dumb way to test unknown substances?
2) What part of the pH scale is best suited for living things?

2/15/13 1) Explain how the pH scale is organized (Label A-E)

Week 24
2/19/13 1) Orange juice has a pH = 5 while Coke's pH = 3. Would your tongue be a good indicator to identify this difference? Explain.

2/20/13 1) How could you use pH paper and lithmus paper to test a solid like salt or bread?

2/21/13 1) Is phenolphthalein more like litmus paper or pH paper? Explain.

2/22/13 1) Is Bromothymol blue more like litmus paper or pH paper? Explain.

Week 25
2/25/13 1) The "lead" in a pencil and a diamond are both made of carbon. How could this be possible?

2/26/13 1) The body's main source of energy is from __________. Reserve energy is stored as ____________.
2) When iodine touches starch, it turns _________ color.

2/27/13 1) Based on yesterday's activity, which food groups contained carbohydrates?

2/28/13 1) The element ________ forms the backbones of many molecules important for living things. These molecules include carbohydrates, ___________,
_______________, and __________________.

3/1/13 1) In yesterday's experiment, _______ reacts first with vitamin C. When all the vitamin C runs out, the iodine then reacts with ___________
and turns a __________ color.

Week 26
3/4/13 1) A monomer is a single unit while a polymer is a _______________________.
2) Name 3 examples of polymers.

3/5/13 1) Where is genetic information stored in the body?

3/6/13 1) Transcribe and translate:

3/7/13 1) Transcribe and translate:

3/8/13 1) DNA is transcribed to RNA in the _______ of cells. The RNA is transported to the __________ where it is translated into _________.

Week 27

3/11/13 1) How can astronomers gather information about other planets and stars?

3/12/13 1) Astronomers can study emissions and _______ lines to find the ________ of a star.

3/13/13 1) Describe 2 reasons that one star may appear brighter than another star in the night sky.

Week 28
3/18/13 1) What are some things you can do to make sure your Science Fair display board looks great?

3/19/13 1) Describe the difference in color between cool, average, and hot stars.

3/20/13 1) Describe how temperature and luminosity are related.
2) Astronomers measures distances to stars in ________ years.

3/21/13 1) List the stages in the life cycle or our sun. What stage is it in now?

3/22/13 1) Large stars do not become white dwarfs at the end of their lives. What are the 3 possible outcomes?

Week 29
4/2/13 1) Should you read everything on your display board for your presentation? Why or why not?

4/3/13 1) List 2 questions that could be asked about any science fair experiment.

4/4/13 1) Why is eye contact important when giving a presentation?

4/5/13 1) List some things that went well and things that could be improved from this year's science fair experiment.

Week 30
4/8/13 1) What is the name of our galaxy?
2) List some objects that are in a galaxy.

4/9/13 1) Briefly describe the 3 types of galaxies. Which type is ours?

4/10/13 1) 2 Galaxies that are closer will move apart at a speed that is _______ than 2 galaxies that are further apart.
2) Ever since the universe was created in the ________ ________, it has been expanding.

4/11/13 1) List 5 types of satellites.
2) Why do rockets have stages when they are launched into space?

4/12/13 1) Explain how Newton's 3rd Law applies to a rocket taking off.

Week 31
4/15/13 1) The moon doesn't produce its own light. Why does it appear to shine at night?

4/16/13 1) A lunar eclipse occurs when ____________'s shadow is on the ____________.
2) A solar eclipse occurs when the ________ goes between the ________ and the earth.

4/17/13 1) Man has not visited the moon since 1972 on Apollo 17. Why don't you think we have returned?

4/18/13 1) Where in space do you think man will travel next? Why?

4/19/13 1) Apollo's command module enters earth's atmosphere at over 24000 miles/hr. Would they have a chance to survive without parachutes?

Week 32
4/22/13 1) How did the astronauts in the Apollo missions return to earth?

4/23/13 & 4/24/13 1) The only place man has visited other than earth is the moon. What type of problems prevent man from traveling further?

4/25/13 & 4/26/13 1) The U.S. has been reducing NASA's budget lately. Do you think spending on NASA is important? Explain.

Week 33
4/29/13 1) What would be required for a space station on the moon?

5/1/13 1) The closest star to Earth is _________. Why is it important for us?

5/2/13 1) The Apollo program ended with Apollo 17 in 1972. Space shuttles were used from 1981-2011.
Use a Venn diagram to compare similarities and differences between space shuttles and rockets.

5/3/13 1) Do you believe that humans are the only intelligent life in the universe? Explain.

Week 34
5/6/13 1) List some objects that could be found in our solar system.

5/7/13 1) Why aren't distances within our solar system measured in light-years?