GED Science

Question 1

The tilt of the Earth's rotational axis toward or away from the sun has the following consequences:

Accepted Answer

Seasons

Answer

The Earth's rotational axis is tilted relative to its orbit around the sun. This tilt causes different hemispheres to be angled towards or away from the sun at various points in the year, leading to variations in the intensity and duration of sunlight received. These variations are the direct cause of the Earth's seasons.

Question 2

Tides, waves, and currents occur in the world's oceans. These variables alter how people interact with the ocean and 
how ocean water interacts with land. Tides are variations in the ocean's sea level that occur on a regular basis.

Accepted Answer

The gravitational pull of the moon on planet Earth

Answer

Tides are primarily caused by the gravitational pull exerted by the Moon on Earth's oceans. The Moon's gravity creates bulges in the ocean water on both the side of Earth facing the Moon and the opposite side, resulting in the regular rise and fall of sea levels. The Sun also contributes to tidal forces, but the Moon's effect is stronger due to its closer proximity.

Question 3

Deoxyribonucleic acid is abbreviated as DNA. DNA is the genetic material that gives an organism the instructions 
it needs to grow, survive, and reproduce. Adenine, guanine, cytosine, and thymine are the four chemical bases 
used to encode information in DNA. The information accessible for creating an organism is determined by the 
sequencing of these bases.

Accepted Answer

The recipe for a fruit smoothie.

Answer

DNA contains the complete set of instructions, or genetic code, that dictates how an organism grows, develops, and functions. This is analogous to a recipe, which provides step-by-step instructions and ingredients needed to create a specific dish. The sequencing of bases in DNA determines the 'recipe' for an organism.

Question 4

The aorta, the body's biggest artery, is 36 mm in diameter in a healthy male. What is the typical diameter of a human 
male's aorta in meters if 1 meter equals 1000 millimeters?

Accepted Answer

0.036

Answer

To convert millimeters to meters, you need to divide the value in millimeters by 1000, since there are 1000 millimeters in 1 meter. Therefore, 36 millimeters divided by 1000 equals 0.036 meters. This conversion is essential for expressing measurements in different metric units.

Question 5

Two objects on Earth are dropped from the top of a 70-meter-high structure. Object A weighs 12 grams while 
object B weighs 6 kg. Which object will reach the ground first, assuming no air resistance?

Accepted Answer

Both objects will hit the ground at the same time

Answer

In the absence of air resistance, all objects fall at the same rate due to the constant acceleration of gravity, regardless of their mass. This principle, famously demonstrated by Galileo, means that both objects, despite their different weights, will experience the same acceleration and therefore hit the ground simultaneously.

GED Practice Test

GED Practice Test

GED Science