(Q).
If electrical currents can cause objects to repel each other, then which of the following can cause objects to repel each other? Answer choices: - electromagnetic energy - mass - Electrical energy - gravitation - electrical currents - photosynthesis - the Great Barrier Reef - electricity
(A).
electrical currents

(Q).
If an item's weight causes its gravitational force, then the weight of an item causes its what? Answer choices: - Temperature - decreases its bodily water - gravitational weight - kinetic energy - gravitational height - gravitational wave - relocation - magnetism
(A).
gravitational weight

(Q).
If greenhouse gas concentrations in the air have increased over the last decade dramatically, then what have increased over the last decade dramatically? Answer choices: - gasoline concentrations - Warm air moving into cold air - Greenhouse gases - treehouse gas concentrations - movements in the earth's crust - concentrated orange juices - genetic diversity - greenhouse gas concentrations
(A).
greenhouse gas concentrations