6th grade Life Science Exam Practice

Which of the following is an example of an experiment?

• A doctor examining a patient's symptoms to make a diagnosis

• A researcher conducting a survey to gather information about people's attitudes

• A scientist testing the effect of a new medication on a group of patients

• A journalist interviewing experts for an article on health and wellness

An investigation is different from an experiment because:

Which of the following is a common method used by scientists to make discoveries?

• Guessing

• Following their intuition

• Conducting research and experiments

• Reading books and articles

Which of the following is an example of a qualitative observation?

• The sky is blue

• The weather is nice today, it is 93 degrees outside

• I think it will rain tomorrow

• The traffic is heavy, there are 30 cars on the road

What is the most likely inference that scientists can make about the new medication's effectiveness on humans based on their observation of reduced headache frequency?

• The medication has no effect on the frequency of headaches in humans.

• The medication may have other side effects that need to be studied further.

• The decrease in headache frequency was due to a random variation in the study's results.

• The medication is effective in reducing the frequency of headaches in humans.

Which of the following is a step in the scientific method?

• Making a conclusion

• Conducting an investigation

• Observing data

• All of the above

Which of the following is NOT a characteristic of cells?

• They are the basic unit of life

• They are only found in animals

• They can perform all the functions necessary for life

• They can replicate themselves

What is the main difference between plant and animal cells?

• Plant cells have a cell wall, while animal cells do not

• Animal cells have a cell wall, while plant cells do not

• Plant cells have a nucleus, while animal cells do not

• Animal cells have a nucleus, while plant cells do not

What is DNA?

• A type of protein found in muscle tissue

• A type of sugar found in the bloodstream

• The genetic material that carries information about an organism

• A type of enzyme found in the digestive system

What is homeostasis?

• The ability of an organism to maintain a stable internal environment

• The ability of an organism to change its environment to suit its needs

• The ability of an organism to survive in extreme conditions

• The ability of an organism to reproduce successfully