Understanding Control and Variables in Experiments

Front

What are hydrogen bonds?

Back

Hydrogen bonds are weak attractions between a hydrogen atom and an electronegative atom.

Front

What are the three atoms that make up water?

Back

Two hydrogen atoms and one oxygen atom.

Tags

NGSS.MS-PS1-1

Front

What are the elements of nucleic acids?

Back

Phosphate group, sugar, nitrogenous bases.

Front

What is polarity?

Back

Polarity is the property of a molecule that describes the distribution of electrical charge, leading to positive and negative ends.

Front

What are the 2 parts of phospholipids?

Back

A hydrophilic head and two hydrophobic tails.

Front

What is a variable in an experiment?

Back

A variable is any factor, trait, or condition that can exist in differing amounts or types.

Tags

NGSS.MS-PS2-2

Front

What is the difference between independent and dependent variables?

Back

The independent variable is the one that is changed or controlled in a scientific experiment, while the dependent variable is the one that is measured or affected.

Front

What is a control group?

Back

A control group is a group in an experiment that does not receive treatment and is used as a benchmark to measure how the other tested subjects do.

Front

Why is it important to have a control in an experiment?

Back

Having a control allows scientists to compare results and determine the effect of the independent variable.

Front

What is the purpose of a hypothesis?

Back

A hypothesis is a testable prediction about the relationship between two or more variables.

Tags

NGSS.MS-LS1-5