Scientific Investigation Quiz 2

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, what are the controlled variables?

• Type of plant, amount of music, and sunlight
• Water, apple juice, milk
• Plant growth

According to the diagram, which question is being tested?

• Do plants grow taller when watered with salt water?
• How much fertilizer do plants need?
• Does fertilizer make plants grow taller?
• What is the best fertilizer to use?

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Students put two plants in the sun. Plant A is in the sun for 10 minutes. Plant B is in the sun for 1 hour. Students decide that plant B is better at photosynthesis. Why is this an invalid conclusion?

• They didn't control all variables

• The independent variable was sunlight

• The dependent variable was amount of gas produced

• they used different amounts of water

Tags

NGSS.MS-LS1-6

Students are growing plants in the dark or in the light to see which grows better.  They put 3 seeds in the dark and 5 seeds in the light because they know seeds are more likely to dry out in the light. 
How could this experiment be improved?

• Put all plants in the light.
• Put all plants in the dark (where they sprout better)
• Put the same number of seeds in each container.
• put all the plants in the light so they grow better

Tags

NGSS.MS-LS1-5

NGSS.MS-LS1-6

NGSS.MS-LS2-1

What would be a logical conclusion based on this data?

• As pH increases, plant growth increases
• pH of 6.6 is an optimal soil pH for plant growth
• pH of 6.2 is an optimal pH for plant growth
• As pH increases, plant growth decreases

Tags

NGSS.MS-LS1-5

In science class, Rico and his classmates are performing a controlled scientific investigation. The teacher has already picked a topic and testable question for the class to study and has provided background research on the topic.

Before performing the investigation, the students must first: 

• Form a hypothesis to predict the outcome of the investigation.
• Analyze the data that results from the investigation.
• Record data from the investigation in graphs and charts.
• Communicate the results of the investigation with the teacher.

A scientist wants to determine which fertilizer is more effective—Miracle Grow or Manure (cow poop).
The best way for her to proceed would be to design an experiment with: 

• Two groups of plants - a group fertilized by Miracle Grow and a control group with no fertilizer.
• Three groups of plants—a group fertilized by Miracle Grow, a group fertilized by both Miracle Grow and manure and a control group with no fertilizer.
• Three groups of plants—a group fertilized by Miracle Grow, a group fertilized by Manure, and a control group with no fertilizer.
• Two groups of plants—a group fertilized by manure and a control group with no fertilizer.

Tags

NGSS.MS-ETS1-1

NGSS.MS-LS1-5

NGSS.MS-LS2-1

A team of doctors is testing the effects of a new drug on sickle-cell anemia patients. The team organizes the patients into two groups. The experimental group is given the drug. The control group is given a placebo, or a substance that has no medicinal value. Neither group knows whether they received the drug or the placebo. Why is having a control group an important part of this experiment?

• Scientists can determine the effects of the drug by comparing those patients that have been treated with the drug to those that have not.
• By having two groups, it allows the scientists to have a larger sample size on which to test the drug.
• It provides the patients with a choice of whether they want to take the experimental drug.
• Scientists are able to study the effects of a second drug on the group that received the placebo.

Tags

NGSS.MS-ETS1-1

Jordan observes that the roses in his garden seem to grow to different heights depending on their location in the garden. He does an experiment to test whether light availability affects the height that his rose bushes grow. He hypothesizes that rose bushes that receive the most direct sunlight will grow the tallest. The results from his experiment are shown below.

Rose Bush Hours of Direct Sunlight Average Height

Group A 0 hours 3 ft

Group B 4 hours 5 ft

Group C 8 hours 6 ft

Which is true about Jordan's results?

• Jordan's results do not support his hypothesis.

• Jordan's results are not related to his hypothesis.

• Jordan's results support his hypothesis.

• Jordan's results prove that all plants grow best in the Sun.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Jami is doing an experiment to find out how temperature slows down or speeds up the sprouting of bean seeds. To prepare for the experiment, she plans to put soil into three cups and place six seeds in each cup.

When Jami performs the experiment, which of the following is the only condition she should change for all of the cups of beans?

• the temperature

• the amount of water

• the amount of sunlight

• the amount of fertilizer

Tags

NGSS.MS-LS1-5