According to the periodic table, which of the following elements has five energy levels

A primary succession does not include any invasive species True or false

True or False. It is better to buy a washer with a higher efficiency rating than a lower efficiency rating.

Which of the following accurately describes the effects of temperature changes on solids? A. If the temperature of a solid is decreased, the solid expands and its volume decreases. B.

Which of these would be the best definition of energy? A) the ability to do work B) the development of a future source of fuel C) the feeling one gets from drinking caffeine D) the feeling one feels after riding a roller coaster

Which way does wind blow, A. horizontally, B. Only from east to west, C. Only from West to east, D. vertically

Cecelia dropped a ball from a height of 2 m. The ball fell in a straight path down to the ground According to Newton's universal law of gravitation, which would change the path of the ball so it traces out the widest curved path possible?

An object becomes charged when the atoms in the object gain or lose. True or False

A container has 79000cm3 of mercury. Find the mass of mercury if the density is 13.6g/cm3

Explain how the movement of groundwater is related to the water cycle.

Two masses are attracted by a gravitational force of 400 N. What will the force of attraction be if each of these two masses is halved?