7 km is equal to:

700 m
0.7 m
7,000 m
70 m

Answers

Answer 1

Answer:

7000m is the answer as 1 km is 1000m ...so 7km multiplied by 1000m u get 7000 m...and always remember if u r converting a bigger unit to a smaller unit u multiply and if u r converting a smaller unit to a bigger unit u divide

Answer 2

Answer:

Answer:7,000m

Explanation:

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Describe meteor showers

Answers

Answer:

a rain of asteroids coming from space

Explanation:

Meteor showers occur when dust or particles from asteroids or comets enter Earth's atmosphere at very high speed. When they hit the atmosphere, meteors rub against air particles and create friction, heating the meteors. The heat vaporizes most meteors, creating what we call shooting stars.

You add 4.7 gg iron to 27.10 mL of water and observe that the volume of iron and water together is 27.70 mLmL . Calculate the density of iron.

Answers

Answer : The density of iron is, 7.8 g/mL

Explanation : Given,

Mass of iron = 4.7 g

Volume of water = 27.10 mL

Volume of water and iron = 27.70 mL

First we have to calculate the volume of iron.

Volume of iron = Volume of water and iron - Volume of water

Volume of iron = 27.70 mL - 27.10 mL

Volume of iron = 0.6 mL

Now we have to calculate the density of iron.

$\text{Density of iron}=\frac{\text{Mass of iron}}{\text{Volume of iron}}$

Now put all the given values in this expression, we get:

$\text{Density of iron}=(4.7g)/(0.6mL)$

$\text{Density of iron}=7.8g/mL$

Thus, the density of iron is, 7.8 g/mL

Charge is important when covalent bonds form

true
False

Answers

True because they need charge in order to make a covalent bond I just learned that

All of the questions

Answers

1. Oxygen
2. CO2 and H2O
3. Oxygen

Blanks...
Oxygen, nasal passage or mouth, nostrils, larnyx, trachea, bronchi, bronchioles, alveoli, chest cavity, diaphragm.

The scientific evidence that scientists use in supporting or critiquing the conclusions of experiments usually consists of

Answers

The scientific evidence that scientists use in supporting or critiquing the conclusions of experiments usually consists observations based on large sample sizes.

Final answer:

The scientific evidence used by scientists usually involves data collected during the course of an experiment. The evidence can be qualitative or quantitative and it is analyzed to draw conclusions. These conclusions either support or reject the initial hypothesis, leading to further hypothesis testing.

Explanation:

Scientists use various forms of evidence to support or critique the conclusions of experiments. This evidence largely consists of data collected during the experiment, which could be either qualitative (descriptive) or quantitative (numerical). These data help in analyzing the results through methods such as statistical, mathematical, or graphical.

Furthermore, scientists use two types of logical reasoning: inductive reasoning using particular results to produce general principles, and deductive reasoning predicting results by applying general principles. After analysis, scientists draw conclusions that can either support or reject their initial hypothesis. If the hypothesis is supported, the process moves on to testing the next related hypothesis. If it's rejected, a new one is formulated for further testing.

Researchers typically present their findings in peer-reviewed scientific papers comprising of sections like introduction, materials and methods, results, and a concluding discussion. This organized and systematic approach ensures the integrity of the scientific process and encourages a thorough scrutiny of every experimental conclusion.

Learn more about Scientific Evidence here:

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Which type of change must occur to form a compound? (1) chemical (3) nuclear(2) physical (4) phase?

Answers

The correct answer is (1) Chemical

Explanation:

A compound is the result of two or more chemical elements that bond to form new substances; for example, water is a compound because this contains two hydrogen atoms bonded to one oxygen atom. Moreover, compounds are the result of a chemical change that occurs as two or more substances interact in a chemical reaction, and this leads to the formation of bonds between the substances or the formation of compounds.

On the other hand, a physical change involves only a change in the state of the matter and a nuclear change leads to a change in the atom rather. Thus, the type of change that must occur to form a compound is a chemical change.

Let's go through each of the answers and think about why they work or don't work.

Chemical forms compounds.

Nuclear changes the element completely. We're going to use the sun as an example. The sun is in a state of plasma. It's really hot and has all these particles hitting into each other. The nucleus' of atoms are hitting into each other forming larger elements. It's real crazy. Nuclear is not correct.

Physical cannot form a compound.

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