| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.51 |
| Score | 0% | 70% |
Meteoroids, meteors and meteorites are categorized based on which of the following?
their location |
|
their size |
|
their density |
|
their temperature |
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.
Gametes have how many pairs of chromosomes?
23 |
|
46 |
|
4 |
|
2 |
Reproductive (haploid) cells known as gametes have half as many (23) pairs of chromosomes as normal (diploid) cells. When the male gamete (sperm) combines with the female gamete (ovum) through meiosis to form a zygote, each gamete supplies half the chromosomes needed to form the normal diploid cells.
Which of the following is the correct order for types of radiation from lowest to highest frequency?
microwaves → radio waves → visible light |
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visible light → ultraviolet light → radio waves |
|
infrared waves → microwaves → ultraviolet light |
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radio waves → visible light → gamma rays |
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.
Which of these is important for the body's maintenance, growth, and repair?
fiber |
|
carbohydrates |
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protein |
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fats |
Found in both animal sources (meat, fish, eggs, cheese) and vegetables (beans, nuts, some grains), proteins are important for the body's maintenance, growth, and repair.
Small rocks shed by asteroids and comets that reach the earth are called:
shooting stars |
|
meteoroids |
|
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.