Question

which of the following could be classified as matter? check all of the boxes that apply.
□ desk
□ water
□ idea
□ cloud
□ helium
□ dream

Explanation:

Matter is anything that has mass and takes up space (has volume).

• A desk is a solid object with mass and volume, so it's matter.
• Water is a liquid with mass and volume, so it's matter.
• An idea is a mental concept, has no mass or volume, not matter.
• A cloud is made of tiny water droplets or ice crystals, has mass and volume, so it's matter.
• Helium is a gas with mass and volume, so it's matter.
• A dream is a mental experience, has no mass or volume, not matter.

Answer:

• desk
• water
• cloud
• helium