Middle School Chemistry

1. When a thermometer is heated, the red liquid inside the thermometer moves up.This is mainly because:

• a) The red liquid is thin.
• b) The molecules of the liquid move faster and get a little further apart
• c) Hot liquid is lighter
• d) The glass of the thermometer gets hot

Tags

NGSS.MS-PS1-4

2. When you heat a sample of a solid, the sample gets a little bigger.This is mainly because:

• a) The particles move faster and get a little further apart
• b) Heat helps the particles grow
• c) Heating the sample makes it lighter
• d) Heating helps the particles slide past each other

Tags

NGSS.MS-PS1-4

3. In the process of conduction

• a) Fast-moving particles get larger
• b) Slow-moving particles get smaller
• c) Fast-moving particles transfer energy to slower-moving particles
• d) Slow-moving particles transfer energy to faster-moving particles

Tags

NGSS.MS-PS3-5

4. A water molecule is made up of

• a) One oxygen atom and two hydrogen atoms
• b) One hydrogen atom and two oxygen atoms
• c) Many different molecules of oxygen
• d) Two hydrogen atoms and two oxygen atoms

Tags

NGSS.MS-PS1-1

5. Hot water evaporates faster than room temperature water. This is mainly because

• a) Molecules of hot water are lighter
• b) More water molecules move fast enough to break away from other water molecules
• c) Room temperature water has more mass
• d) The molecules in room temperature water are moving faster

Tags

NGSS.MS-PS1-4

6. Different liquids have different freezing points mainly because

• a) Freezers are at different temperatures
• b) Some winters are colder than others
• c) The less liquid you use, the faster it freezes
• d) Molecules of different liquids have a different amount of attraction

Tags

NGSS.MS-PS1-4

7. If two objects have the same volume but one has a greater mass, the one with greater mass

• a) Has a lower density
• b) Has a higher density
• c) Will float
• d) Will sink

8. If you cut a wooden block in half, each half would have

• a) Half the density of the original piece
• b) Twice the density of the original piece
• c) The same density as the original piece
• d) No density at all

9. An object should float in a liquid if it is

• a) More dense than the liquid
• b) Less dense than the liquid
• c) Lighter than metal
• d) Shaped like a ball

10. The density of hot water

• a) Is greater than the density of cold water
• b) Is less than the density of cold water
• c) The same as the density of cold water
• d) Depends on the volume of water