7th Adv Q2 QSE Review 7.6C 8.6E 7.7A 7.7C

Front

What is speed?

Back

Speed is the distance traveled per unit of time, typically measured in kilometers per hour (km/h) or miles per hour (mph).

Front

How do you calculate speed?

Back

Speed = Distance ÷ Time.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a chemical change?

Back

A chemical change occurs when a substance transforms into a different substance with different properties.

Front

Give an example of a physical change.

Back

Melting ice is an example of a physical change.

Front

Give an example of a chemical change.

Back

Baking soda reacting with vinegar to produce carbon dioxide is a chemical change.

Front

What is the main difference between a chemical change and a physical change?

Back

A chemical change alters the substance's identity, while a physical change does not.

Front

What is the state of matter represented by a definite volume but no definite shape?

Back

Liquid.

Front

What is the state of matter that has a definite shape and volume?

Back

Solid.

Front

What is the state of matter that has neither a definite shape nor a definite volume?

Back

Gas.