Counting the number of organisms in a small area and multiplying to estimate the number in a larger area is called

a.

direct observation.

b.

mark and recapture.

c.

population density.

d.

sampling.

Explain the difference between speed and velocity

A rocket moves through outer space at 12,000 m/s. At this rate, how much time would be required to travel the distance from Earth to the Moon, which is 380,000 km?

The equation for density is mass divided by volume if you pack more mass into a certain volume the density will? A: increase B: decrease C: stay the same

According to the big bang theory, what occurred in the brief instant after the big bang?

A force of 450 n accelerates a box across a frictionless surface at a rate of 15 m/s2. what is the mass of the box?

You have two pendulums with cords that are exactly the same length. one is on earth (with an acceleration due to gravity of 9.81 meters/second2) and the other one is on the moon (with an acceleration due to gravity of 1.63 meters/second2).

The magnetic field is 0.0 2M from the wire is 0.1 T what is the magnitude of the magnetic field 0.0 1M from the same wire

A 747 jetliner lands and begins to slow to a stop as it moves along the runway. If its mass is 3.5 x 10 exponent 5 kg, its speed is 27.0 m/s and the net braking force is 4.30 x 10 exponent 5 N, (A) what id its speed 7.

What is matter in context clues

The metallic elements which all react in water are found in the: same group same period rare earth elements