Parts of an Experiment Review

Different types of rose bushes are grown in a greenhouse for two months. The number of flowers on each bush is counted at the end of the experiment.

(What’s the Independent Variable?)

• The number of flowers.

• Different types of rose bushes.

• The greenhouse.

• There isn't one.

You water three sunflower plants with salt water. Each plant receives a different concentration of salt solutions. A fourth plant receives pure water. After a two- week period, the height is measured.

(What’s the Independent Variable?)

• Height of the plant.

• Type of plant.

• Concentration of salt solution.

• Plant getting pure water.

Different rose bushes are grown in a greenhouse for two months. The number of flowers on each bush is counted at the end of the experiment.

(What’s the Control Group?)

• The number of flowers.

• Different types of rose bushes.

• The greenhouse.

• There isn't one.

Three redwood trees are kept at different humidity levels inside a greenhouse for 12 weeks. One tree is left outside in normal conditions. The heights of the trees are measured once a week.

(What’s the Independent Variable?)

• Humidity level.

• Height of each tree.

• The tree left outside.

• Type of tree.

You water three sunflower plants with salt water. Each plant receives a different concentration of salt solutions. A fourth plant receives pure water. After a two- week period, the height is measured.

(What’s the Dependent Variable?)

• Height of the plant.

• Type of plant.

• Concentration of salt solution.

• Plant getting pure water.

Pea plant clones are giving different amounts of water for three-week period. The first pea plant receives 400 milliliters a day. The second pea plant receives 200 milliliters a day. The third pea plant receives 100 milliliters a day. The fourth pea plant does not receive any extra water: the plant only receives natural ways of receiving water. The heights of the pea plants are recorded daily.

(What’s the Independent Variable?)

• Height of the plant.

• Amount of water.

• The plant only getting water naturally.

• Type of plant.

Pea plant clones are giving different amounts of water for three-week period. The first pea plant receives 400 milliliters a day. The second pea plant receives 200 milliliters a day. The third pea plant receives 100 milliliters a day. The fourth pea plant does not receive any extra water: the plant only receives natural ways of receiving water. The heights of the pea plants are recorded daily.

(What’s the Control Group?)

• Height of the plant.

• Amount of water.

• The plant only getting water naturally.

• Type of plant.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Three redwood trees are kept at different humidity levels inside a greenhouse for 12 weeks. One tree is left outside in normal conditions. The heights of the trees are measured once a week.

(What’s the Dependent Variable?)

• Humidity level.

• Height of each tree.

• The tree left outside.

• Type of tree.

Different types of rose bushes are grown in a greenhouse for two months. The number of flowers on each bush is counted at the end of the experiment.

(What’s the Dependent Variable?)

• The number of flowers.

• Different types of rose bushes.

• The greenhouse.

• There isn't one.

You water three sunflower plants with salt water. Each plant receives a different concentration of salt solutions. A fourth plant receives pure water. After a two- week period, the height is measured.

(What’s the Control Group?)

• Height of the plant.

• Type of plant.

• Concentration of salt solution.

• Plant getting pure water.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1