What are bones basically made of? (Choose the best answer?) * Vitamins and minerals.
Non-organic materials.
Collagen and minerals.
Collagen and protein.
choose one

The law of conservation of energy states that energy cannot be created or , energy can be from one substance to another. the first blank is ' destroyed ' and for the second blank is ' transferred '

Aregion of space in which a measurable gravitational force is indicated by the force exerted on a test mass is called

Which statements about tornadoes are true? check all that apply. (a) about 12,000 tornadoes hit the united states every year. (b) a tornado looks like a funnel. (c) tornadoes are deadly atmospheric storms that cause millions in damages each year. (d) tornadoes can reach wind speeds of more than 300 miles per hour. (e) kansas is the state with the most tornadoes. (f) you will always notice a funnel before a tornado strikes.