End of Year

Water drops stay together on wax paper and they don’t break apart easily. This is mainly because:

• Water molecules are wet

• Water molecules are attracted to each other

• Water molecules are in motion

• Water molecules are small

Food coloring spreads out faster in hot water than in cold water. This is mainly because:

• The food coloring molecules are small

• The molecules in hot water are large

• The water molecules in hot water move more quickly

• Hot water is less dense

When you heat a sample of a solid, the particles that make up the solid:

• get bigger

• lose mass

• move faster

• slow down

Choose all that apply: To describe a solid, you could say:

• The particles of a solid are attracted to each other

• The particles of a solid can move past one another

• The particles of a solid vibrate but do not move past one another

• A solid has mass and takes up space

_____________is often defined as anything that has mass and takes up space.

• matter

• mass

• chemistry

• weight

Choose all that apply: To describe a gas, you could say:

• The particles are very attracted to each other

• The particles are not very attracted to each other

• The particles are close together like a liquid

• The particles of a gas are further apart than the particles in a liquid or solid

My particles are able to slide past one another, but are still close together

• Gas

• Plasma

• Liquid

• Solid

Which type of organic molecule is found primarily in a cell's nucleus? 

• lipids
• carbohydrates
• nucleic acids
• proteins

Which of the following is an example of an element?

• cell
• water
• hydrogen
• starch

The cell membrane is made mostly of a double layer of molecules called

• lipids
• proteins
• nucleic acids
• carbohydrates