GED Science Test #8

Question 1

Because of this, ice floats on water.

Accepted Answer

ice is less dense than water

Answer

water conducts heat better than ice

Answer

ice has a lower temperature

Answer

it needs energy from the sun to melt.

Question 2

Two spheres that are negatively charged

Accepted Answer

repel each other.

Answer

neither attract nor repel each other.

Answer

attract each other only when the distance between them is small.

Answer

attract each other.

Question 3

Which of the following statements regarding gravity is false?

Accepted Answer

The gravitational force between two objects depends only on the mass of the larger object.

Answer

The gravitational force between a person and the moon is lower than the gravitational force between a person and the Earth, people can jump higher on the moon than on Earth.

Answer

The gravitational force between two things increases as their mass increases.

Answer

The gravitational force between two objects is proportional to their separation.

Question 4

Which two liquids have the potential to form an acid-base reaction?

Accepted Answer

Bleach and vinegar

Answer

Lye and ammonia

Answer

Bleach and ammonia

Answer

Blood and saliva

Question 5

When a process is exothermic, heat is expelled into the environment. Burning wood is an example of an exothermic process. An endothermic process necessitates the use of heat from the environment. Boiling water is an example of an endothermic reaction. Which of the following is an example of an endothermic reaction?

Accepted Answer

Mmelting ice

Answer

The formation of helium on the sun

Answer

Detonation of an explosive

Answer

Burning paper

Question 6

In the winter, people wear woolen gloves because

Accepted Answer

decrease the loss of body heat to surroundings through insulation.

Answer

increase the amount of heat energy generated by the body through conduction.

Answer

generate heat energy through radiation.

Answer

increase the temperature of cold air through convection.

Question 7

The term "phase change" refers to the process by which matter takes on a new shape (solid, liquid, gas). A phase change is defined as which of the following?

Accepted Answer

Condensation of water vapor

Answer

Digestion of food

Answer

Dry-cleaning

Answer

Exhaling

Question 8

Newton's laws of motion state that an item in motion will stay in motion unless a force acts on it. When you suspend an object from a string and allow it to swing, it will swing for a short time before slowing down and stopping. What causes the suspended object to come to a halt?

Accepted Answer

Because energy of motion is converted to heat through friction with air

Answer

Since the ability to work is defined by energy

Answer

Because the mass of the object is too small to maintain the motion

Answer

Because an object at rest remains at rest unless a force acts upon it

Question 9

Which of the following statements regarding energy and/or matter is false?

Accepted Answer

Heat energy is composed of heat atoms.

Answer

Matter and energy can’t be created.

Answer

All matter tends toward more disordered states.

Answer

Energy can be stored and transferred.

Question 10

What is accurate regarding the genetic code?

Accepted Answer

Multiple codons can code for the same amino acid

Answer

One codon can code for multiple amino acids

Answer

Codons are composed of 4 nucleotide segments

Answer

There are only 20 functional codons, due to the 20 amino acids found in organisms