| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.52 |
| Score | 0% | 70% |
Molecules and atoms that are inputs to a chemical reaction are known as which of the following?
reactants |
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products |
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fuel |
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components |
During a chemical reaction molecules and atoms (reactants) are rearranged into new combinations that result in new kinds of atoms or molecules (products).
The heart __________ blood.
oxygenates |
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filters |
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deoxygenates |
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creates |
To provide oxygen to the body, blood flows through the heart in a path formed by the right atrium → right ventricle → lungs → left atrium → left ventricle → body. When blood enters the right side of the heart it is deoxygenated. It enters the left side of the heart oxygenated after traveling to the lungs.
In the metric system, what prefix represents 10-3?
milli |
|
centi |
|
mega |
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kilo |
In the metric system, milli is the prefix for 10-3.
The number system most used in science is the:
American system |
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metric system |
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British system |
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English system |
The metric system is a number system that designates one base unit for each type of measurement. For example, the base unit for length is the meter and the base unit for mass is the gram.
What part of the food chain serves only as food for other organisms?
primary consumers |
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producers |
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secondary consumers |
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decomposers |
Producers (autotrophs) serve as a food source for other organisms. Typical producers are plants that can make their own food through photosynthesis and certain bacteria that are capable of converting inorganic substances into food through chemosynthesis