National parks and wilderness areas are designed to do which of the following

A) provide areas for recreation

B) protect wildlife and endangered species

C) preserve endangered areas

D) all of the above

What property do the following elements have in common? sulfur, iodine, and magnesium A) Same phase at room temperature. B) Good conductors of electricity. C) Same number of valence electrons. Eliminate D) They form cations (positive ions).

What are two different types of electromagnetic waves

Which of the following is equal to an impulse of 9 units? A. Force = 5, time = 2 B. Force = 1, time = 8.5 C. Force = 2, time = 4.5 D. Force = 3, time = 2

The best material to connect a power source to a light bulb is one that

Atoms that emit particles and energy from their nuclei are

Which tuning fork would sound lower, one with frequency 512 Hz or 128 Hz?

Our solar system is located in the center of the milky way galaxy. true or false

A thermometer is placed in water in order to measure the water's temperature. What would cause the liquid in the thermometer to rise? A. The molecules in the water move closer together. B. The molecules in the thermometer's liquid spread apart. C.

If 30ml of a fluid has a mass of 63g what is it's density

If we double the mass of the sun, what would happen to the gravitational force between the sun and earth?