The inner planets ____ outer planets. a. have higher masses than the b. have hig

Question

The inner planets ____ outer planets.

a. have higher masses than the

b. have higher densities than the

c. are younger than the

d. are older than the

Identify the correct statement.

a. Heat flows from a lower temperature to a higher temperature.

b. Gases flow from high pressure to low pressure.

c. Electricity flows from a lower potential to a higher potential.

d. Water flows from the valley to the mountain.

At atmospheric pressure, a phase change occurs when .

a. the temperature of water increases from 40 degrees Fahrenheit to 45 degrees Fahrenheit.

b. ice melts to liquid water.

c. ice warms up from 10 degrees Fahrenheit to 20 degrees Fahrenheit.

d. water is cooled from 35 degrees Celsius to 30 degrees Celsius.

Which statement is correct?

a. Voltage flows in circuits.

b. Charge flows in circuits.

c. A battery is the source of electrons in a circuit.

d. All are correct.

Which of the following has the most molecules?

a. 1 gram of hydrogen.

b. 1 gram of carbon.

c. 1 gram of gold.

d. they all have the same number of molecules.

A weak acid is added to a concentrated solution of hydrochloric acid. Does the solution become more or less acidic?: Why?

a. more acidic, because there are more hydronium ions being added to the solution.

b. less acidic, because the solution becomes more dilute with less concentrated solution of hydronium ions being added to it.

c. no change in acidity, because the concentration of hydrochloric acid is too high to be changed by the weak solution.

d. less acidic, because the concentration of hydroxide ions will increase.

Explain the difference between

Explanation / Answer

1)d. are older than the

2) b. Gases flow from high pressure to low pressure

3)a. the temperature of water increases from 40 degrees Fahrenheit to 45 degrees Fahrenheit.

4)d. All are correct.

5)c. 1 gram of gold.

6)b. less acidic, because the solution becomes more dilute with less concentrated solution of hydronium ions being added to it.

7)Weather is the state of the atmosphere, to the degree that it is hot or cold, wet or dry, calm or stormy, clear or cloudy over a short period of time. Climate is defined as statistical weather information comprising of temperature, humidity, atmospheric pressure, wind, rainfall. It describes the variation of weather at a given place for a long period of time.

8)Newton's laws of motions are the three physical basic laws for the basis of classical mechanics. The second law of motion states: 'The acceleration A of a body is parallel and directly proportional to the net force F acting on the body, is in the direction of the net force, and is inversely proportional to the mass M of the body.'The Laws of Motion where arranged in Sir Isaac Newton's work that was first published in 1687

9)The development of the theory of plate tectonics is a great example of the changing scientific knowledge because like the plates science is changing.

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