Show:
Testable Questions and Observations
Variables, Fair Tests, and Writing a Hypothesis
Analyzing Data
Energy Transformation, Storage etc.
Mechanical Energy Calculations
100

Which of the following is an example of a relevant observation in an experiment about plant growth?

  • A. Noticing the color of the pot the plant is in
  • B. Measuring the height of the plant every week
  • C. Observing the type of shoes the scientist wears
  • D. Counting how many clouds are in the sky

B. Measuring the height of the plant every week

100

What is a hypothesis?

  • A. A random guess
  • B. A scientific question
  • C. An educated guess that predicts the outcome of an experiment
  • D. A list of materials used in an experiment

C. An educated guess that predicts the outcome of an experiment

100

What is the "mean" in a set of numbers?

  • A. The largest number in the set
  • B. The most frequently occurring number in the set
  • C. The average of the numbers
  • D. The middle number in the set when ordered

C. The average of the numbers

100

 What is it called when energy changes from one form to another, like when chemical energy in food becomes mechanical energy in your body?

  • A. Energy transfer
  • B. Energy conservation
  • C. Energy transformation
  • D. Energy loss

C. Energy transformation

100

If an object has a mass of 5 kg and a height of 4m, what is its potential energy (PE)?

  • A. 40J
  • B. 50J
  • C. 200J
  • D. 400J
  • Answer: C. 200J
  • Explanation: PE=mgh=5⋅10⋅4=200 J .
200

This type of observation is gathered through the senses or tools and directly relates to answering a scientific question.

  • A. Irrelevant observation
  • B. Random observation
  • C. Relevant observation
  • D. Predictive observation

C. Relevant observation

200

Which of the following is the best example of a hypothesis?

  • A. “Does fertilizer help plants grow taller?”
  • B. “If plants are given fertilizer, then they will grow taller.”
  • C. “Plants like fertilizer.”
  • D. “Fertilizer is expensive.”

B. “If plants are given fertilizer, then they will grow taller.”

200

Which type of graph is best for showing how data changes over time?

  • A. Bar graph
  • B. Line graph
  • C. Pie chart
  • D. Scatter plot

B. Line graph

200

What is the difference between an open and a closed system?

  • A. Open systems lose energy, while closed systems do not allow energy to leave.
  • B. Open systems store energy, while closed systems create energy.
  • C. Open systems allow energy and matter to flow in and out, while closed systems do not.
  • D. Open systems are always more efficient than closed systems.

C. Open systems allow energy and matter to flow in and out, while closed systems do not.

200

An object with a mass of 2 kg is moving at a speed of 3m/s. What is its kinetic energy (KE)?

  • A. 6J
  • B. 9J
  • C. 12J
  • D. 18J

B. 9J

300

What makes a question “testable” in a scientific investigation?

  • A. It is easy to answer without doing an experiment.
  • B. It can be answered through observation and experimentation.
  • C. It only requires a yes or no answer.
  • D. It asks for someone’s opinion.

B. It can be answered through observation and experimentation.

300

If you are testing how the type of liquid affects plant growth, which of the following must remain constant to ensure a fair test?

  • A. The amount of light, soil, and liquid given to the plants
  • B. The type of liquid given to each plant
  • C. The height of the plants at the start of the experiment
  • D. The time of day you observe the plants

A. The amount of light, soil, and liquid given to the plants

300

In the set {4, 4, 5, 6, 7, 7, 7}, which number is the mode?

  • A. 5
  • B. 6
  • C. 7
  • D. 4

C. 7

300

Sitting near a campfire, you feel warmth without touching the fire. What type of thermal energy transfer is this?

  • A. Conduction
  • B. Convection
  • C. Radiation
  • D. Evaporation

C. Radiation

300

What is potential energy?

  • A. Energy in motion
  • B. Energy stored due to position or height
  • C. Energy from the Sun
  • D. Energy created by a machine

B. Energy stored due to position or height

400

Which of the following is an example of a testable question?

  • A. Why is the sky blue?
  • B. What do cats think about people?
  • C. How does the amount of sunlight affect plant growth?
  • D. What is your favorite type of music?

C. How does the amount of sunlight affect plant growth?

400

If you are testing how temperature affects how fast sugar dissolves, what is the dependent variable?

  • A. The temperature of the water
  • B. The type of sugar used
  • C. The time it takes for the sugar to dissolve
  • D. The amount of water used

C. The time it takes for the sugar to dissolve

400

What is the purpose of a pie chart?

  • A. To show the relationship between two variables
  • B. To compare parts of a whole as percentages or proportions
  • C. To display changes over time
  • D. To predict future trends

B. To compare parts of a whole as percentages or proportions

400

In which everyday scenario does conduction occur?

  • A. A metal spoon getting hot in a pot of soup
  • B. Warm air rising in a heated room
  • C. Sunlight warming your face
  • D. Clouds forming in the sky

A. A metal spoon getting hot in a pot of soup

400

Which of the following describes an example of kinetic energy?

  • A. A book sitting on a table
  • B. A rollercoaster speeding down a hill
  • C. Water stored behind a dam
  • D. A stretched rubber band

B. A rollercoaster speeding down a hill

500

A testable question must include these two variables:

  • A. Relevant and irrelevant variables
  • B. Independent and dependent variables
  • C. Observed and predicted variables
  • D. Hypothetical and experimental variables
  • B. Independent and dependent variables
500

Controlled variables are important in an experiment because:

  • A. They are the variables you measure to get results
  • B. They ensure that the experiment is a fair test by staying constant
  • C. They are always changed to observe different outcomes
  • D. They determine the conclusion of the experiment

B. They ensure that the experiment is a fair test by staying constant

500

What is the range of the data set {15, 10, 25, 20, 5}?

  • A. 20
  • B. 15
  • C. 25
  • D. 5

A. 20

500

When you drop a ball, potential energy transforms into which type of energy as it falls?

  • A. Kinetic energy
  • B. Electrical energy
  • C. Chemical energy
  • D. Nuclear energy

A. Kinetic energy

500

An object has a potential energy of 150J and a kinetic energy of 50J. What is its mechanical energy (ME)?

  • A. 100J
  • B. 150J
  • C. 200J
  • D. 250J
  • C. 200J