What happens to liquids when they are exposed to air?

• They melt.
• They freeze.
• They evaporate.
• They weigh more.

Tags

NGSS.MS-PS1-4

What is it called when water drops form on objects? Why does this happen? (Short Answer)

• Evaporation, air heats up
• Condensation, air cools down
• Melting, solid to a liquid
• Freezing, liquid to a solid

Tags

NGSS.MS-ESS2-4

Hot balloons are steered by _____.

• a satellite
• steering wheels attached to the baskets
• foot brakes
• going up or down to find air currents blowing in the right direction

George Washington Carver gave many of his products away because ____.

• the products were not very good
• he wanted to help people
• he knew people would advertise for him
• he didn’t need the money because his parents had a lot of money

When a solid becomes a liquid:

• It turns purple.
• The molecules come unglued.
• The atoms speed up.
• The atoms slow down.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Look at the graph on the right. Approximately what percentage of oil was used as an energy source in 2011?

• 32%
• 5%
• 10%
• 22%

Look at the graph on the right. Approximately what percentage of oil was used as an energy source in 1974?

• 16%
• 25%
• 46%
• less than 1%

Which of the following gases make up most of the air that we breathe?

• oxygen, nitrogen and carbon dioxide
• glycerin, carbon and hydrogen
• calcium, peroxide, and oxygen
• hydrogen, helium and carbon monoxide

Who were the first recorded passengers of a hot air balloon?

• a sheep, a rooster and a duck
• Bill Nye
• George Washington Carver
• a cow, a puppy and a lizard

How are lead and plastic foam different? (Short Answer)

• Lead is heavier and more densely packed with atoms then plastic foam.
• Lead is lighter and less densely packed with atoms then plastic foam.