Grade 5 Energy Unit

What is one of the primary uses of airplanes today?

• Entertainment

• Commerce

• Local commuting

• Historical research

What is another significant use of airplanes mentioned in the text?

• Space exploration

• Underwater diving

• Military operations

• Farming

According to the text, for what personal reason do people use airplanes?

• To visit historical sites

• To travel or visit friends/family

• To attend online classes

• To participate in sports

Is the statement "A Boeing 747 can fly from New York to Australia with one tank of gas" true or false?

• True

• False

According to the text, is it true that most humans are afraid of flying?

• True

• False

What is air primarily composed of?

• Carbon dioxide and helium

• Oxygen and nitrogen

• Hydrogen and oxygen

• Methane and argon

Which property of air allows it to be compressed?

• Air takes up space

• Air has weight/mass

• Air can be compressed

• Air is affected by heat

How does altitude affect the air pressure?

• Higher altitude increases air pressure

• Higher altitude does not affect air pressure

• Higher altitude decreases air pressure

• Altitude affects only the temperature of air, not pressure

What happens to air when it is heated?

• Air particles move slower and expand

• Air particles stop moving

• Air particles move faster and expand

• Air particles condense and move slower

Why wouldn't the water fall out of the cup during the experiment?

• Because the cup was sealed tightly

• Because the air pressure inside the cup was higher than outside

• Because the air pressure outside the cup was higher than inside, keeping the water in

• Because the water was frozen