Case 21 2nd 9 Weeks Study Guide

Question 1

What is the difference between qualitative and quantitative data?

Answer 1

Qualitative data is descriptive (color, size, texture a) quantitative data measured using numbers (height, weight, mass)

Question 2

Why is skepticism and important part of science?

Answer 2

It allows for the formation of new theories by considering other explanations for the data. Example police officers are skeptical with the evidence that I don’t rule out any possible solutions to a crime

Question 3

What is an inference?

Answer 3

Inference is a conclusion based on prior knowledge. Observation is information gathered through the senses examples the grass is wet observation. it rained last night. inference

Question 4

Explain what it means to analyze the data?

Answer 4

Find patterns in the data and list them in order. Ex (smallest to biggest )in relationship to the independent and dependent variable

Question 5

When should the scientist revise their conclusion?

Answer 5

When their data is not repeatable.

Question 6

How can technology affect scientific knowledge?

Answer 6

Technology advances scientific knowledge. For example, improvements to the microscope have lead to new discoveries.

Question 7

What are the formulas for speed and acceleration?

Answer 7

Speed equals distance divided by time, acceleration =(final speed - initial speed) / by time

Question 8

What determines if an object is in motion?

Answer 8

Change in position

Question 9

What are three ways an object can accelerate?

Answer 9

Stayed up, slow down, change direction

Question 10

What type of current does the power grid use? Explain why.

Answer 10

AC current because the voltage can be increased and decreased to travel long distance is and move in both directions.

Question 11

Explain the functions of each of the following parts of the power grid: substation, transformer, generator, turbine, powerlines.

Answer 11

Substation – step up voltage for long distances
Transformer – decrease voltage before entering home
Generator – produce electricity, turbine – spends the generator
Powerlines – Carrie electricity long distances

Question 12

What are the products of combustion?

Answer 12

Carbon dioxide and water vapor

Question 13

Name three gases that contribute to the greenhouse effect.

Answer 13

Carbon dioxide methane and water vapor

Question 14

Of these three, which one seems to have the biggest impact on temperature increases in our atmosphere?

Answer 14

Carbon dioxide

Question 15

What to activities have caused the largest increase of greenhouse gases in the atmosphere over the last hundred years?

Answer 15

Burning fossil feuls

Question 16

Describe the importance of the carbon/oxygen cycle.

Answer 16

Photosynthesis and respiration cycle oxygen/carbon through the atmosphere

Question 17

What type of energy sources can generate electricity without burning a fuel source?

Answer 17

Wind, solar and hydroelectric (renewable)

Question 18

What can we do to reduce the effects of global warming?

Answer 18

Drive less, turn off lights, use electricity less, recycle, decrease dependence on fossil feels, plant more trees

Question 19

How does air pressure relate to wind speed?

Answer 19

When air pressure decreases, wind speed increases

Question 20

What happens to the density of air when it cools

Answer 20

It increases, which makes it sink

Question 21

Describe an air mass that forms over each of the following locations: Canada, Gulf of Mexico, North Pacific ocean.

Answer 21

Canada: Cold and dry, Gulf of Mexico: warm and humid, North Pacific ocean: cold and humid

Question 22

What do each of the following measure: anemometer, barometer, hygrometer?

Answer 22

Anemometer – wind speed, barometer – air pressure, hygrometer – humidity

Question 23

What type of weather is associated with high pressure system? Explain why.

Answer 23

Clear and sunny skies because moisture cannot rise to condense

Question 24

What type of weather is associated with a low pressure system? Explain why.

Answer 24

Clouds, rain, maybe thunderstorms because moisture rises to condense

Question 25

At what latitude line will hurricane move back towards the east?

Answer 25

30 N

Question 26

What strengthens the hurricane? What weakens a hurricane?

Answer 26

Strengthen – warm water, low pressure

Weaken – land, Coldwater, and high pressure

Question 27

What is the difference between the easterlies and westerlies

Answer 27

Westerlies blow from the west to east and calls hurricanes to turn away from the United States. Trade winds blow hurricanes from east to west toward the United States

Question 28

What direction does weather generally move across the United States?

Answer 28

West to east

Question 29

How does air temperature relate to the amount of water vapor it can hold?

Answer 29

Warmer the air the more water vapor it can hold

Question 30

Explain how the earths rotation and revolution affect the lengths of days, years, and seasons.

Answer 30

Revolution is orbiting around the sun. It takes one year. It causes the seasons to change along with the tilt. Rotation causes night and day and takes 24 hours. Earth rotates from east to west counterclockwise

Question 31

Give the number of degrees latitude for each line and give the dates in which the sun is overhead.

Answer 31

Tropic of Cancer – 23.5 N Tropic of Capricorn – 23.5 S equator – zero