Which of these best describe the chemical composition of asteroids? select all that apply.

a. ice

b. silicate

c. hydrogen

d. carbon-based

When a virus enters a living cell, the virus a. eats the cell b. makes the cell produce more cells c. dies d. causes the cell to make more viruses

Which is an example of a scientist using a conceptual model to describe a volcano? a. the scientist calculates the amount of lava that comes out a volcano. b. the scientist thinks of the volcano as an exploding fire hydrant. c.

Explain the relationship among cells, tissues, organs, and organ systems.

Que elemento una onda luminosa determina el color

Where would you find water on the moon?

An environmentally-conscious student is breaking the rings from a six-pack drink holder before disposing of it. This reduces the potential for the six-pack ring to ensnare wildlife and cause ecological harm.

If the mass of a material is 49 grams and the volume of the material is 10 cm^3, what would the density of the material be?

What did you notice about crossing two heterozygous genotype?

A toll booth on a turnpike is open from 8:00 AM until midnight. Vehicles start arriving at 7:45 AM at a uniform rate of 6 veh/min. At 8:15 AM the rate drops to 2 veh/min.

A tornado lifts a truck 252 m above the ground. As the storm continues, the tornado throws the truck horizontally. It lands 560 m away from where it was picked up.