Explain the difference between and Inference and and an observation.
An inference is a conclusion based on a set of observations
An observation can be Qualitative or Quantitative and is based on direct contact through the use of one of the 5 senses.
100
In a food web the arrow always point toward which member of the group?
The arrow points toward the consumer.
100
Sample 1: Tastes sour and turns litmus paper red
Sample 2: Does not change the color of litmus
Sample 3: Tastes bitter and turns litmus blue
Sample 4: Corrosive to metal and has a ph of 5
Which samples are likely to be acids?
Sample 1 and sample 5
100
Define Calorie
The amount of energy needed to raise 1 gram of water by 1 degree C.
200
What numbers on the ph scale indicate bases?
8-14
200
A valid inference is what?
A) always supported by evidence
B) always free from bias
c) Always correct
D) Always agreed upon by many people
A) Always supported by evidence
200
Define Producer and Consumer
The producer is a plant(or organism) that makes its own food.
A consumer is a creature that must eat to get its energy.
200
Sample 1: Tastes sour and turns litmus paper red
Sample 2: Does not change the color of litmus
Sample 3: Tastes bitter and turns litmus blue
Sample 4: Corrosive to metal and has a ph of 5
Which sample(s) are likely to be basic? (A base)
Sample 3
200
You are hired to help someone lose weight. Which item would be most helpful.
A) caloric expenditure
B) net calories
C) their daily intake of carbohydrates
D) their daily intake of fats
Net Calories
Total calories-Calories Expended= Net Calories
300
If an unknown liquid is tested with litmus paper and the paper turns blue, What type of liquid is present?
Bases turn red litmus paper blue
A base is present
300
Explain the difference between Quantitative and Qualitative observations
Quantitative observations are those that are measurable or countable (they contain numbers)
Qualitative observations are those that are describable but not measurable
300
What does the primary consumer eat?
The producer
300
Which Category below is most likely to be the independent variable?
Prototype Surface area Shape Mass Descent Time
A 50 Rectangle 100 123
B 75 Rectangle 100 157
C 100 Rectangle 100 184
D 125 Rectangle 100 166
E 150 Rectangle 100 149
F 175 Rectangle 100 ???
Surface area
The thing the scientist changes
300
A person's calorie intake is higher this his metabolic and energy needs. What will happen to the person over time?
The person will gain weight.
The person will gain weight because they are consuming more energy than they need.
400
A liquid called citric acid is used in soda. It can clean car engines, corrode metal and turns litmus paper red.
What type of liquid is this? What could its ph be?
3, 7, 10, 8
This is an acid and the ph must be 3.
7 is neutral
8 and 10 are bases
400
How many quantitative observations are in the passage below?
There are 5 students taking a hike in the rocky mountains. A rain storm started which made the temperature drop 25 degrees. The students decided to set up their 3 tents and make camp for the night.
3 Quantitive observations
400
What does the secondary consumer eat?
The primary consumer
400
Which Category below is most likely to be the dependent variable?
Prototype Surface area Shape Mass Descent Time
A 50 Rectangle 100 123
B 75 Rectangle 100 157
C 100 Rectangle 100 184
D 125 Rectangle 100 166
E 150 Rectangle 100 149
F 175 Rectangle 100 ???
The dependent variable is the Descent time. The thing the scientist measures.
400
What do you think the descent time for F is likely to be?
Prototype Surface area Shape Mass Descent Time
A 50 Rectangle 100 123
B 75 Rectangle 100 157
C 100 Rectangle 100 184
D 125 Rectangle 100 166
E 150 Rectangle 100 149
F 175 Rectangle 100 ???
135 is a good guess.
The time is going down starting with prototype E so it should be less than 149.
500
Define the ph scale
The ph scale is a scale used to determine the strength of acids and bases
500
Which sentence below is an inference.
It has been sunny for the last 3 days so it will be sunny tomorrow.
I am looking at the sky and it is blue today/
I am holding a cold drink.
It has been sunny for the last 3 days so it will be sunny tomorrow.
500
Can creatures hold more than one classification in a food web.
For instance, can a shrimp be both a primary and secondary consumer?
Yes, depending on the activity with in the web some creature can be classified on different food web levels.
500
What are the controlled variables?
Prototype Surface area Shape Mass Descent Time
A 50 Rectangle 100 123
B 75 Rectangle 100 157
C 100 Rectangle 100 184
D 125 Rectangle 100 166
E 150 Rectangle 100 149
F 175 Rectangle 100 ???
Controlled variable are those that do not change. In this case the MAss and the shape of the canopy.
500
Which prototype would you pick to deliver supplies and why?
Prototype Surface area Shape Mass Descent Time
A 50 Rectangle 100 123
B 75 Rectangle 100 157
C 100 Rectangle 100 184
D 125 Rectangle 100 166
E 150 Rectangle 100 149
F 175 Rectangle 100 ???
The best choice is C because it has the greatest descent time. We do not want the parachute to be destroyed on descent.