Which of these is the beginning of the life cycle of stars with different initial masses?

1 answer:

5 0

The doppler effect, when used with light, produces a shift of frequencies to red. Well, no matter which direction you look, there is a shift to red! That means that the universe is expanding or moving away from us in every direction. The idea, is that this could only happen if all matter was once in a single point, and there was an explosion. This explosion from a single point is called the big bang theory.
A nebula is a cloud of gases that can coagulate to become a new star.

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Why do cells need to replicate their DNA?

Vesnalui [34]

Answer:

Replication is an essential process because, whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell. ... Once the DNA in a cell is replicated, the cell can divide into two cells, each of which has an identical copy of the original DNA.

Explanation:

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2 years ago

What are physical properties? Give some examples.

tatyana61 [14]

Answer:

Physical property is defined as the property of a substance which can be measured without changing its chemical identity. Physical properties are observable properties of a substance. In other words, physical properties can be measured by watching, listening, feel, touch or smell.

Some examples of physical property are: Hard, soft, color, odor, and luster etcetera.

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2 years ago

Butter is an example of

Mashutka [201]

Answer:

The answer is A- A saturated fat

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3 years ago

Plant cells make their own food by taking in A) oxygen and water. B) oxygen and hydrogen. C) carbon dioxide and water. D) carbon

Setler79 [48]

The correct anwser your looking for is "C"

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3 years ago

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A biology class is studying the effect of temperature on the amount of growth of duckweed in an aquarium. What type of data will

iragen [17]

Answer:

$\boxed {\boxed {\sf They \ will \ gather \ quantitative \ data \ using \ a \ thermometer \ and \ a \ balance}}$

Explanation:

First, let's identify the tools needed.

Since the biology class is studying the temperature, they will likely need a thermometer. Also, they are gathering information about the growth of the plants. This could use a balance of a meterstick.

Next, recall the difference between quantitative and qualitative data.

Quantitative: Measurable and numerical results found using scientific instruments/devices
Qualitative: Data found using the senses, such as descriptions and diagrams.

Since the class is measuring temperature and growth using tools, it must be quantitative data.

We can eliminate choices A and B, because they claim the class will gather qualitative data. Then, we can eliminate choice D, because a beaker and timer won't help with temperature and growth. That leaves choice C as the correct answer.

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3 years ago

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