| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.46 |
| Score | 0% | 69% |
Changes to an object's speed or direction of motion are caused by which of the following?
a force |
|
work |
|
kinetic energy |
|
power |
Force is applied to change an object's speed or direction of motion.
In cell biology, where does DNA replication take place?
nucleus |
|
mitochondria |
|
Golgi apparatus |
|
cytoplasm |
The cell nucleus contains the genetic material of the cell and is where DNA replication takes place.
__________ is caused by a lack of iron in the diet.
diabetes |
|
anemia |
|
scurvy |
|
shingles |
Anemia, which may cause weakness, dizziness, and headaches is caused by a lack of iron in the diet.
Small rocks shed by asteroids and comets that reach the earth are called:
meteoroids |
|
shooting stars |
|
meteorites |
|
meteors |
Smaller rocks shed by asteroids and comets are called meteoroids. When these rocks reach Earth's atmosphere, they burn up in the mesosphere and become meteors. If a meteor manages to reach the Earth, it is called a meteorite.
Which of the following is the correct order for types of radiation from lowest to highest frequency?
radio waves → visible light → gamma rays |
|
infrared waves → microwaves → ultraviolet light |
|
visible light → ultraviolet light → radio waves |
|
microwaves → radio waves → visible light |
The electromagnetic spectrum covers all possible wavelengths and frequencies of radiation. From lowest frequency (longest wavelength) to highest frequency (shortest wavelength) radiation: radio waves → microwaves → infrared waves → visible light → ultraviolet light → X-rays → gamma rays.