Materials have unique properties because each one is made up of different kinds of which particle?

A. Protons

B. Quarks

C. Electrons

D. Atoms

Positive feedback interactions in earth's systems are always a result of human action. T/F

Newtons second law of motion can also be described as what

What is the main source of groundwater? A. precipitation falling into man-made wells B. precipitation seeping through pores and cracks in the ground C. morning dew collecting on the surface of shrubs and grasses

A man is shot out of a cannon towards the center of an 80 foot long catching net 200 feet away. Unfortunately, the person in charge of aiming the cannon did not consider the crosswind.

If a substance is found to be reactive flammable soluble and explosive what observation is also a physical property

What trends were seen in Mendeleev's periodic table?

Through which medium would EM waves travel the fastest? A. The Ocean B. The Atmosphere C. Rocks

Average mass of a toy car (small, hot wheels) ?

A cannon directed straight upward launches a ball with an initial speed v. The ball reaches a maximum height h in a time t. Then, the same cannon is used to launch a second ball straight upward at a speed 2v.

Does the sun fuse hydrogen into helium or vice versa?