Ice causes a crack to form in a rock. This is an example of

mechanical weathering

chemical weathering

erosion

molecular weathering

What type of mixture be made up of elements and compounds?

Which of the following is an appropriate receive filter bandwidth for minimizing noise and interference for CW reception? A. 500 Hz B. 1000 Hz C. 2400 Hz D. 5000 Hz

What temperature is the speed of a given chemical reaction the fastest?

If you roast a marshmallow is it a chemical or physical change

When the wagon's brakes are off, the engine pulls the wagon forwards. A frictional force also acts on the wagon. In what direction does the frictional force act?

Match these terms with their definitions: 1. unit of electrical resistance ampere 2. unit of electromotive force or electrical potential ohm 3. unit for measuring the strength of an electric current volt 4. unit of electrical power watt

In which is momentum conserved: an elastic collision or an inelastic collision?

List the types of radiation in order from least to most damaging.

Which of the following statements best describes the current state of understanding regarding the apparent acceleration of the expansion of the universe?

Should young people be allowed to do extreme sports? (give me two reasons why) 1. Opinion: 2. Reason why: 3. Reason why: