Which is an example of a chemical reaction?

A: paper folded into tiny pieces

B: paper burned and turned into smoke

C: paper soaked in water

D: paper shredded and turned into pulp

Which of the following is example of direct observation

You first walk 8.0 km north from home, then walk east until your distance from home is 10.0km. how far east did you walk

What is the Coriolis effect? A The rising of warm air, causing low pressure B The falling of cool air, causing high pressure C The bending of wind because of Earth's rotation D Local convection currents that occur at the coast, causing sea and land

Which elements are metalloids

Which test is performed by a-radiologist?

Why is it important to develop alternative energy sources

Which of the following subatomic particles does not have a charge? A.) electron B.) proton C.) neutron D.) positron

How do we use light in space?

What units are used for gravitational potential energy? Write the name, not the symbol.

A 7.5 kg block is placed on a table. If it's bottom surface area is 0.6m2, how much pressure does the block exert on the tabletop? A. 376.5 Pa B. 73.5 Pa C. 226.5 Pa D. 122.5 Pa