St. Angela_Practice for Examination for Periodical Test

You want to investigate the effect of sunlight on plant growth. Which of the following is the aim of your experiment?

• To grow plants in different pots.

• To measure the height of plants.

• To determine if sunlight affects plant growth.

• To observe plants in a classroom.

When designing the method for your plant growth experiment, you would need to:

• Decide how many plants to use.

• Calculate the average height of plants.

• Write a conclusion about your findings.

• Analyze the data collected.

After conducting your experiment, you collect data on the height of plants in different conditions. This data is considered the results of your investigation. What is the best way to present this data?

• A paragraph

• A table or graph

• A question

• A hypothesis

Based on your data, you conclude that plants grow taller with more sunlight. This conclusion is based on the analysis of your results. Which of the following is an important aspect of drawing a conclusion?

• Ignoring any unexpected results

• Making a guess about the outcome

• Considering the evidence from your data

• Repeating the experiment many times

You're conducting an experiment to measure the length of different plant seedlings. What is the most appropriate unit of measurement to use?

• Kilometers

• Centimeters

• Liters

• Grams

You're collecting data on the temperature of a liquid over time. Which scientific instrument would you use?

• Ruler

• Thermometer

• Balance

• Stopwatch

You're conducting an experiment to measure the volume of different liquids. Which of the following units would you use?

• Meters

• Seconds

• Milliliters

• Newtons

You're measuring the time it takes for a ball to roll down a ramp. Which scientific instrument would you use?

• Stopwatch

• Ruler

• Thermometer

• Balance

Scientists use models to represent things that are too small, too large, or too distant to observe directly. Which of the following is an example of a scientific model?

• A globe

• A real tree

• A person

• A cloud

Why do scientists use models to explain phenomena?

• Models are always more accurate than real-life observations.

• Models can help us visualize things we can't see directly.

• Models are easier to change than real-life objects.

• Models are always cheaper to create than real-life experiments.