Science

Question 1

How can technology affect scientific knowledge?

Answer 1

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

Question 2

What is a logical argument for why the technology is not a perfect, permanent solution for monitoring brain activity?

Answer 2

The technology may become outdated when a newer technology is developed

Question 3

Part you control and purposely change as you are doing the experiment

Answer 3

Independent variable

Question 4

Part being measured during the experiment

Answer 4

Dependent variable

Question 5

Do not get independent variable & used to make comparison of the degree of the affect

Answer 5

Control groups

Question 6

Variables that stay the same

Answer 6

Constants

Question 7

How Temperature Affects the Solubility of Salt in Water.

Answer 7

Measure the solubility of salt in water at several different temperatures

Question 8

What is the difference between inference and observation?

Answer 8

Inference: conclusion based on prior knowledge. Observation: information gathered through senses.

Question 9

What is the difference between qualitative and quantitative data?

Answer 9

Qualitative data: description

Quantitative: measurements

Question 10

Effect from caffeine on the heart rate

Answer 10

Caffeine causes heart rate to increase

Question 11

Yeast,sugar,water in a flask

Answer 11

The yeast consumed the sugar and released has as its product.

Question 12

Effect of excercise on pulse rate

Answer 12

Type of excercise has an effect on how much the pulse increases after activity

Question 13

Which argument logically defends this conclusion? (10)

Answer 13

For the results to be valid, the researchers also should have given a placebo tablet to 5000 individuals as a control group for comparison.

Question 14

Measures mass in grams

Answer 14

Triple beam balance

Question 15

Measures temperature in Celsius

Answer 15

Thermometer

Question 16

Measures volume in millimeters

Answer 16

Graduated cylinder

Question 17

Why is skepticism an important part of science?

Answer 17

It allows the formation of new theories by considering other explanations for the data.

Question 18

Write a statement that describes skepticism about the data?

Answer 18

Neelly wonders if the dishwashing data is accurate since the range is so large.

Question 19

Which of these describes how dan should respond to Carlos skepticism?

Answer 19

Dan should run new tests to include other variables that Carlos mentioned to confirm that the original conclusions are valid

Question 20

What does it mean to analyze the date?

Answer 20

It finds patterns in the data & lists them in order

Question 21

Which of these is a logical summary for the data of the graph?

Answer 21

Quantitative data indicating that routine vaccination resulted in the number of cases

Question 22

Ethan concluded that liquid B has the highest boiling point.

What led to this conclusion?

Answer 22

Quantitative measurement of how long it took for the liquids to boil.

Question 23

Products the electricity by converting other energy sources using a generator

Answer 23

Power plant

Question 24

Transports electrical current from the power plant to substances and homes or businesses

Answer 24

Transmission line

Question 25

Raise and lower voltages as the AC current travels to and from the power plant to distribute electrical currents to the right places with the right amount of current quickly over large distances

Answer 25

Substations

Question 26

Lower voltage to be ready to enter a home or business

Answer 26

Transformer

Question 27

Distribute electricity throughout the home

Answer 27

Junction box

Question 28

Path of electricity from a local power substation to a lamp in a home

Answer 28

Substation-transformer- junction box-outlet-electric circuit of lamp

Question 29

What is the device in the power grid that reduces the voltage between the power line and the home?

Answer 29

Transformer

Question 30

Why is AC used instead of DC (direct current)?

Answer 30

The Voltage can be changed in an alternating current system to transfer energy more efficiently

Question 31

Inertia; an object at rest or in motion will stay at rest in motion until an unbalanced force is applied

Answer 31

1st law

Question 32

Force=mass*acceleration; an object will accelerate in the direction the net force is applied

Answer 32

2nd law

Question 33

Action/reaction; for every action there is an equal and opposite reaction

Answer 33

3rd law

Question 34

A student in a bus leaned back automatically when the bus started moving suddenly

Answer 34

1st law

Question 35

Toms paddle pushed the water backward to move his kayak forward

Answer 35

3rd law

Question 36

Students in a moving bus leaned forward when the bus quickly applied the brakes

Answer 36

1st law

Question 37

Erika could throw a pencil farther than she could throw a heavy bowling ball.

Answer 37

2nd law

Question 38

How many molecules of O2 are needed to balance this chemical equation?

Answer 38

3

Question 39

How is the shape of the pyramid related to energy flow within the ecosystem?

Answer 39

Only a small amount of energy from one tropic level is available to organisms at the next highest level

Question 40

Food chain

Answer 40

Cordgrass,grasshopper, sparrow ,hawk

Question 41

Products made from photosynthesis

Answer 41

Glucose and oxygen

Question 42

Nerve cell-blood cell

Answer 42

Nerve cell:long branched transmitting information | Blood cell:small round deliver oxygen through capillaries

Question 43

What can be concluded about the importance of Bacteria in the nitrogen cycle?

Answer 43

Bacteria are important because they change nitrogen into nitrates that animals need.