Midterm Study Guide Physical Science

1. Define the terms mean, median and mode?

MEAN

MEDIAN

MODE

2. A list of five test scores was 60, 67, 73, 63 and 67. Find the following and show your work where applicable

MEAN

MEDIAN

MODE

MATTER (S8P1A)

3. In the chemical formula CHO3, what does the 3 represent?

4. Draw what the molecule of that compound (CHO3) might look like.

Midterm Study Guide Physical Science

5. In the space below, draw and label an atom. Make sure to include the particles and their charges.

6. Using your periodic table, label the atomic number and the atomic mass and then draw the atom for chlorine using the Bohr diagram below.

S8P1b

7. What is an element? Can elements change into other elements?

8. When elements react chemically, what is formed?

9. What happens to the properties of the elements when they react to form a compound?

______

Cl_____

Midterm Study Guide Physical Science

10. If two poisonous elements are combined chemically, which of the following will be true of the resulting compound?

A. The compound will be more poisonous than the gases.B. The compound will be as poisonous as the gases.C. The compound may or may not be poisonous.D. The compound will not be poisonous.

11. What is a pure substance? What 2 categories of matter are considered pure substances?

12. In the boxes below, identify which are elements, compounds and mixtures and write PS next to those that are pure substances.

S8P1c13. In the boxes below, draw each state of matter and then describe each

SOLID LIQUID GAS PLASMA

Midterm Study Guide Physical Science

S8P1d14. List the 3 chemical properties of matter.

15. List 6 physical properties of matter.

16. Using the table below, draw how these substances would stack up in a beaker or graduated cylinder if they DID NOT mix.

.

17. The density of water is 1.0 g/mL. What would happen to a piece of cork with a density that is less than 1.0?

18. What is the formula for density?

S8P1e19. What is the difference between a physical change and a chemical change? Also,

give some examples.

physical change chemical change

Midterm Study Guide Physical Science

20. How do you know a chemical change has taken place?

S8P1f

21. Describe the differences between metals, metallioids and nonmetalsMetals Metalloids NonMetals

22. Using the periodic table below, indicate where the metals, nonmetals and metalloids are located.

.

23. Pick two elements from the same family using the periodic table above and state why they are more alike than two elements from the same period.

Midterm Study Guide Physical Science

S8P1g24. Julian measured the mass of a piece of dry wood and then burned it and measured the remaining material. He found that the mass of the burned material did not equal the mass of the wood. What is one reason for this?

A Some matter was lost as heat.B He did not make accurate measurements.

C He did not consider mass lost through evaporation.D. He did not consider the mass of the gases involved.

25. The diagram below shows molecules before they react in a chemical reaction. Atoms are represented by circles, and molecules are represented by circles that are connected to each other. The different colored circles represent different kinds of atoms.

Which of the following diagrams could represent the molecules that result from the chemical reaction and why?

Because there were 6 atoms before the reaction and 6 atoms after the reaction.

Because there were 2 kinds of molecules before the reaction and 2 kinds of molecules after the reaction.

Because there were 4 white atoms and 2 gray atoms before the reaction and 4 white atoms and 2 gray atoms after the reaction.

Because there were 3 molecules before the reaction and 3 molecules after the reaction.

26. A student has two different liquids in open jars.  She pours the liquid from one jar into the other jar, and she observes bubbles.  After the bubbling stops, she finds

Midterm Study Guide Physical Science

that the total weight of the liquids is now less than the total weight of the liquids before they were mixed together.

How can her observation be explained?A. Some atoms went into the air. B. Some atoms were destroyed.

C. Some atoms became heavier.D. Some atoms became lighter.

FORCES AND MOTION (S8P3a)

27. What is the difference between speed and velocity?

28. ______27. Taya walked 0.24 km to mail a letter. It took her exactly 2 minutes to arrive at the mailbox. What is her speed? Show your work?

29. What are the three types of acceleration?

Midterm Study Guide Physical Science

30. Draw a distance-time graph that shows:a. no motionb. constant speedc. acceleration

31. Draw a velocity-time graph that shows: a. accelerationb. decelerationc. constant speedd. no motion

S8P3b32. What are some common unbalanced forces that affect the motion of an object?

33. Draw 2 objects with a small amount of gravity and draw two objects with a large amount of gravity?

Decreased Gravity Increased Gravity

34. In the drawing below, which shows an unbalanced force and why?

35. Look at the picture below. According to Newton’s third law, what will happen?

Midterm Study Guide Physical Science

36. What is the difference between mass and weight?

Mass Weight

37.

38. DEFINE Write 2 examples Increase MA Decrease MA

Midterm Study Guide Physical Science

Lever:

Pulley:

Wheel and axle:

Inclined plane:

Wedge:

39. What two factors determine whether or not work has been done?(page 211)

a)

b)

40. Define work?(page 210)