What types of energy occurs when a grapefruit falls from a tree? TRUE OF FALSE: Combustion reactions occur in the presence of oxygen gas. * Energy is the ability to do work. * A renewable energy source is one that is replaceable. * Light energy is emitted by certain organisms such as fireflies and glow-worms. Sound energy cannot travel through air Heat energy cannot travel through a liquid for example water.

The energy conversions that occur when a grapefruit falls from a tree is;

Potential energy ---> kinetic energy ---> potential energy

Combustion reactions occur in the presence of oxygen gas- True

Energy is the ability to do work - True

A renewable energy source is one that is replaceable - True

Light energy is emitted by certain organisms such as fireflies and glow-worms - True

Sound energy cannot travel through air - False

Heat energy cannot travel through a liquid for example water - False

Explanation:

According to the first law of thermodynamics, energy can not be created nor destroyed but is converted from one form to another. When a grapefruit falls from a tree, the energy conversion is as follows;

Potential energy ---> kinetic energy ---> potential energy

Combustion reaction refers to a reaction where a substance is burnt in oxygen to produce heat and light.

Energy is defined in science as the ability to do work. Renewable energy can be replaced. A typical example is solar energy.

Light energy is emitted by certain organisms such as fireflies and glow-worms.

Sound is a mechanical wave hence it must be transmitted through a medium. The medium through which sound waves are transmitted is air.

Heat travels through any thermal conductor. Water is an example of a good thermal conductor. Heat indeed travels through different liquids.

supercell thunderstorms are perhaps the most violent of all thunderstorm types, and are capable of producing damaging winds, large hail, and weak-to-violent tornadoes