Revision Test 1

What occurs when one or more substances change to produce one or more different substances?

• Physical property

• Pure substance

• Chemical reaction

• Chemical property

What is a property that requires a chemical interaction to observe?

• Physical property

• Pure substance

• Chemical reaction

• Chemical property

What is a large amount of something?

• Pure substance

• Chemical property

• Bulk quantities

• Chemical reaction

What has definite composition and properties?

• Bulk quantities

• Chemical property

• Physical property

• Pure substance

What is a property that is observed without making changes to the substance?

• Bulk quantities

• Chemical property

• Chemical reaction

• Physical property

If a chemical reaction occurs, the properties of substances before and after the substances interact must be _____________.

• different

• identical

• unchanged

• similar

What is a property that can be used to identify an unknown substance?

• Bulk quantities

• Pure substance

• Elements

• Density

When a chocolate bar melts, the chemical properties of that substance are ___________.

• the same

• changed

• destroyed

• enhanced

Select the chemical reactions.

• Water freezes and turns to ice

• Combining hydrogen and oxygen to create water

• Water is heated and turns to steam

• An egg is cooked and fried

Select the physical reactions.

• Water is frozen and turns to ice

• An egg is cooked and fried

• Water is heated and turns to steam

• Hydrogen and oxygen combine to form water