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Ch. 2 Clicker Review

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Ch. 2 Clicker Review

7th grade

Mrs. Laubscher

1. spring scale

2. a meniscus

3. a triple beam balance

4. graduated cylinder

- always wear safety goggles.
- always follow your teacher’s instructions and lab or textbook directions exactly.
- always wear an lab apron.
- design and conduct your own experiments without asking your teacher.

- Mass, a graduated cylinder
- Length, a metric ruler
- Time, seconds
- Volume, L x H x W or water displacement

- Mass = grams
- Weight = newtons
- Length = meters
- Volume = g/cm3

- 5 kg = 5000 g
- 2 L = 2000 mL
- 3 m = 30 cm
- 10 decigrams = 1 g

- Boiling point is 100 degrees Celsius.
- Freezing point is 0 degrees Fahrenheit.
- Boiling point is 273 degrees Kelvin.
- Freezing point is 0 degrees Kelvin.

If the data collected when measuring your dog’s tail was 27 cm, 36 cm, 25 cm, and 39 cm and the actual value was 30 cm, you could conclude that your data was. . .

- Accurate and precise
- Accurate but not precise
- Precise but not accurate
- Neither accurate nor precise.

- anomalous data.
- a significant figure.
- an estimate.
- a percent error.

- The length of a belt.
- The height of a bee.
- The distance from Chesterland to Mayfield.
- The density of a pin.

- There are more than two variables.
- There is a strong relationship between the variables.
- The graph has no use or value.
- There is no relationship between the variables.

- 1000
- 100
- 1
- 10

- precision
- significant figures
- estimation
- anomalous data

- percent error
- precision
- significant figures
- accuracy

- linear graph.
- anomalous graph.
- nonlinear graph.
- a faulty graph.

- Start first aid treatment.
- Find the emergency equipment.
- Call 911.
- Notify your teacher.

- process
- system
- feedback
- model

- Mean
- Median
- Mode
- Range

- Percent error
- Median
- Mode
- Range

- Mean
- Median
- Mode
- Range

- Mean
- Median
- Mode
- Significant figure

- Multiply L x W x H
- Divide volume by mass.
- Multiply weight x volume.
- Divide mass by volume.

- Deka = 100
- Hecto = 10
- Milli = 1/100
- Kilo = 1000

- Mass
- Volume
- Weight
- Density

- mass measures the force of gravity on an object.
- weight measures the amount of matter an object contains.
- weight measures the force of gravity on an object.
- mass measures the space an object takes up.

- density
- volume
- weight
- mass

- Fahrenheit
- Kelvin
- Celsius
- The boiling point of water.

- precision
- percent error
- accuracy
- significant figure

- what variables were controlled in an experiment
- how the dependent variable changes in response to the independent variable.
- the input, process and output of a system
- changes in the independent variable

- 5 g/cm3
- 45 g/ml
- .2 g/cm3
- .2 g/ml

- Less than, sink
- Greater than, float
- Equal to, sink
- Less than, float

- the digits that have been measured exactly, plus one digit whose value has been estimated.
- only the digits that have been measured exactly.
- only the digit whose value has been estimated.
- only zeroes that are after the decimal point.

- What is its volume?

- What is the mean?

- What is the median?

- What is the mode?

- What is the range?

What is your percent error?

Hint: experimental –actual x 100%

actual

- They show how different sets of data are related.
- They are easier to make than bar graphs.
- They can show both numerical and categorical data.
- They give more information than bar graphs.

- turn off, unplug, and return any equipment to its proper place.
- pour all liquid wastes down the sink drain.
- wash your hands thoroughly.
- clean up your work area.

- Kg/m3
- g/cm3
- ml
- cm3

- molecules move to fast.
- molecules are hazardous.
- molecules are too small.
- molecules are too far away.

- The distance from Solon to Chesterland.
- The length of a car.
- The length of a nail.
- The weight of a jet plane.

- cover the spill with a dressing.
- flush the skin with large amounts of water.
- go to the emergency room.
- apply an ice pack.

In a home central heating system, when the room temperature measured by the thermostat reaches a set value, the thermostat switches off the heater. This action by the thermostat is an example of

- feedback
- process
- output
- input

- simple models
- graphs
- diagrams
- computer programs