Understanding Momentum and Collisions

(Regular) exercise can increase

your fitness.

(CLOSEST)

• unusual

• changing

• different

• every day

Viruses are (tiny) germs that cause diseases in people, animals and plants. They are about 0.02 to 0.25 microns. (CLOSEST)

• huge

• large

• small

• giant

you can burn fat by doing thí simple exercise routine. Repeat the actions again (CLOSEST)

• technique

• habit

• movement

• diet

Antibiotics are often used to treat infections cáued by bacteria (CLOSEST)

• cure

• control

• reduce

• expand

Bacteria are so dangerous. Scientists should find a way to get rid of them all (CLOSEST)

• release

• waste

• remove

• erase

To stay healthy, you should cut down on sugar and fast food (OPPOSITE)

• increase

• reduce

• develop

• replace

How can we prevent diseases cáued by vruses.(OPPOSITE)

• approve

• continue

• support

• avoid

Having a balanced diet is the key to a health lifestyle(OPPOSITE)

• Momentum is only affected by velocity, not mass.

• Increasing mass decreases momentum.

• Mass has no effect on momentum.

• The mass of an object directly affects its momentum; greater mass results in greater momentum if velocity is constant.