Scientific Method
What is the first step of the scientific method?
Make an observation
Which type of graph is best for comparing different categories?
Bar graph.
What is matter?
Anything that has mass and takes up space.
What is a physical property?
A characteristic of matter that can be observed or measured without changing the substance.
What are the three common states of matter?
Solid, liquid, and gas.
A testable prediction about what you think will happen in an experiment called...
A hypothesis
Which type of graph is best for showing how something changes over time?
Line graph.
What is mass?
The amount of matter in an object.
Name two physical properties.
Any two of: color, shape, size, texture, mass, volume, temperature, hardness.
What state of matter has a definite shape and a definite volume?
Solid.
A student asks, “Does the amount of sunlight affect how tall a plant grows?” What step of the scientific method is this?
Asking a question.
You want to show how students in a class spend their 24 hours: sleeping, at school, doing homework, and playing. Which graph would be best?
Pie/circle graph.
What is volume?
The amount of space an object takes up.
Name three physical properties of the rock.
Gray, rough, hard, or heavy/mass.
A 100 g piece of ice melts into water. What is the mass of the water?
100 g.
After an experiment, a scientist looks at the numbers they collected and looks for patterns. What step are they doing?
Analyzing data.
A student records the number of students who chose each favorite sport: soccer, basketball, football, and baseball. What type of graph would be best to show the results?
Bar graph.
3 water bottles have 500 mL in total. How much mass does 1 bottle have?
100 mL
Which one is NOT a physical property: color, texture, mass, or burning?
Burning.
What does the conservation of mass tell us?
Matter is not created or destroyed during a change. The total amount of matter stays the same.
A student says, “My hypothesis was wrong, so my experiment was a failure.” Is the student correct? Explain why.
No. An experiment can still be useful even if the hypothesis is not supported. The scientist learns from the results and uses the evidence to draw a conclusion.
A scientist records the temperature of water every minute for 10 minutes. What type of graph should the scientist use, and why?
Line graph, because it shows how the temperature changes over time.
A student says, “Air is not matter because I can't see it.” Is the student correct? Explain.
No. Air is matter because it has mass and takes up space.
A student says, “Melting is a physical property because ice can melt.” Is the student correct?
No. Melting is a physical change, not a physical property. A physical property describes a characteristic, such as color, texture, mass, or volume.
A student puts 200 g of water into a sealed container and freezes it. After freezing, the water is now ice. What is the mass of the ice? Explain why.
200 g. The water changed from a liquid to a solid, but the amount of matter stayed the same.