matter and energy at a seventh grade level

What is chemistry the study of?

• Matter
• Time
• Space
• Energy

What is matter?

• All the time in the universe
• All the energy in the universe
• All the physical things in the universe
• All the space in the universe

What is the difference between physical and chemical properties?

• Physical properties and chemical properties cannot be observed
• Physical properties and chemical properties are the same thing
• Physical properties can only be observed by changing the substance, while chemical properties can be observed without changing the substance
• Physical properties can be observed without changing the substance, while chemical properties can only be observed by changing the substance

What is the difference between pure substances and mixtures?

• Pure substances are made up of more than one type of particle, while mixtures are made up of only one type of particle
• Pure substances and mixtures cannot be observed
• Pure substances and mixtures are the same thing
• Pure substances are made up of only one type of particle, while mixtures are made up of more than one type of particle

What is the size of a hydrogen atom compared to a period?

• 1 trillionth
• 1 billionth
• 1 millionth
• 1 ten millionth

What is the number of water molecules in 1 tablespoon of water?

• 600 thousand
• 600 billion trillion
• 600 million
• 600

What is matter made of?

• Cells and tissues
• Atoms and molecules
• Plants and animals
• Rocks and minerals

What is the basic building block of all matter?

• Atoms
• Cells
• Tissues
• Molecules

What is a molecule?

• A particle made of one cell
• A particle made of two or more atoms bonded together
• A particle made of two or more cells bonded together
• A particle made of one atom

How long would it take to count all the molecules in a tablespoon of water if you could count one million molecules every second?

• About 20 billion years
• About 200 million centuries
• About 20 million centuries
• About 200 years