Unit 1 Test

Scientific investigations include many different steps.  During a scientific investigation, which step occurs after a scientist collects data? 

• Draw Conclusions
• Form the hypothesis
• Plan the experiment
• Follow the procedure

A good experiment has several characteristics.  Which characteristic is part of a good scientific experiment? 

• Results can be reproduced
• Results are not reviewed by peers
• Results are based on a small sample size
• Results based on undisclosed procedure

What time will the water temperature reach 16 degrees? 

• 4 seconds
• 5 seconds
• 6 seconds
• 7 seconds

A student wants to buy a new skateboard.  He wants to find out if the size of the wheels affects how far he can coast on the skateboard.  What is the independent variable in this experiment? 

• size of the wheels
• how far he can coast
• skateboard material
• location he is skating

A science class wants to find out if the shape of objects, made of the same metal, affect how fast these objects sink in water. The students use three objects that have the same mass but different shapes. The students drop each object into a large water tank and measure how long it takes for each object to reach the bottom of the tank.  What is the dependent variable in this experiment? 

• The shape
• The type of metal
• The mass 
• How fast the objects sink

The atom model has changed over time.  Why did this scientific knowledge change over time?

• Thomson, Rutherford, and current scientists have different opinions of atoms.
• New empirical evidence leads scientists to modify existing models.
• Older models were based on opinions, whereas current models are based on facts.
• Thomson and Rutherford’s ideas were completely incorrect.

Which is an example of repetition? 

• 1
• 2
• 3
• 4

Scientists use bar graphs to display information because _____________

• it is easy for people to compare results
• it is fun to make
• it is the the most accurate graph
• it is the easiest graph to make

What skill is a scientist using when she listens to the sounds that whales makes?

• interpreting data
• drawing a conclusion
• making an observation
• making a hypothesis

What could you measure with this tool?

• how tall a plant is
• how high you can jump
• how hot it is outside
• how long it takes your friend to run