MS LS1-5 Review

A new disease has decreased wheat crop production on a farm. In order to increase crop production again, which step should the farmer take?

• rotate different types of crops planted in the same area as the wheat crops

• select different types of wheat seeds and plant them all together to cross-pollinate

• plant the wheat in a different field where the soil has not been contaminated

• crossbreed wheat plants that are disease resistant with wheat plants with a high yield

Tags

NGSS.MS-LS1-5

NGSS.MS-LS4-4

A student was investigating the growth rate of a certain plant species. He planted three plants of the same species in separate pots. Each plant was grown under the same light source and received the same amount of water and fertilizer over a five-day period. His results are shown in the graph. The student concluded that Plant 1 was grown in soil with fewer nutrients than the other two plants. Which is another acceptable explanation for the difference in the growth of the plants?

• Plant 1 had a fungus in the soil that prevented it from growing.

• Plants 2 and 3 were given a different type of fertilizer to grow.

• Plant 1 received mineral-enriched water that prevented its growth.

• Plants 2 and 3 were given growth hormone supplements.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

A gardener wants to see if a kind of fertilizer helps their tomato plants produce more tomato fruits. They put the fertilizer in one row of tomato plants. In another row of plants, they do not use any fertilizer. Which is best for the gardener to compare in their experiment?

• the height of each tomato plant

• the amount of sunlight each plant receives

• the number of tomatoes they pick each week

• the amount of fertilizer they put down each week

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

A group of students compared the effects of fertilizer on the growth of tomato plants. The students gave six tomato plants Fertilizer 1 and six other tomato plants Fertilizer 2. They grew the plants under the same conditions. After several weeks, the students concluded that the tomato plants that received Fertilizer 1 grew taller than those that received Fertilizer 2. Which of the following actions would have increased the accuracy of the results of this investigation?

• using different growing conditions for a group of the plants

• growing a group of tomato plants without fertilizer

• growing different types of plants with each fertilizer

• applying a combination of fertilizers to all the plants

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Students were investigating the effect of fertilizer on tomato plants. Some of their data are shown in the table below.

• The tomato plant that received the most fertilizer produced the greatest number of tomatoes.

• A tomato plant will produce larger tomatoes if it is given more fertilizer.

• Tomato plants that received more fertilizer were taller than the other plants.

• The best tasting tomatoes came from tomato plants that received between 1 and 2 mL of fertilizer.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Students on two different school campuses are comparing the growth rate of grass three weeks after fertilizer has been applied. The same fertilizer and the same amount of water are used on both campuses. Which additional variable is most important to control when the results of the two investigations are compared?

• type of grass used

• amount of trees in the area

• the weather conditions of the day

• the time of day the measurements are taken

Tags

NGSS.MS-ETS1-1

Scientists have discovered that cobs from corn plants are larger and have more kernels than cobs thousands of years ago. Which farming technique is most likely used to grow corn with larger cobs?

• protecting corn crops from insect pests

• growing the corn in arid conditions

• farming in areas with long growing seasons

• selectively breeding corn plants every year

Tags

NGSS.MS-LS1-5

Which is an example of an organism that has been selectively bred for a particular genetic trait?

• cats that eat mice

• cows that graze on grass

• pigs that form large herds

• chickens that lay large eggs

Tags

NGSS.HS-LS3-2

Researchers are developing new types of crop plants with desirable characteristics such as disease resistance and drought tolerance. Crossing plants so that the next generation will express desirable traits is best described as

• selective breeding.

• natural selection.

• genetic engineering.

• gene sequencing.

Tags

NGSS.MS-LS4-4

NGSS.MS-LS4-5

Jacob wanted to study the effect of fertilizer on plants. He used four identical plants in containers of the same size. He counted the total number of drops of fertilizer added to each plant. He measured the height of each plant and recorded the increase in height. All other conditions such as soil, water, and amount of light remained the same for all four plants. The data collected is shown. Why did Jacob leave the fertilizer out of container 1?

• It was the control in the experiment.

• It was already growing without any fertilizer.

• It was the dependent variable in the experiment.

• It was the independent variable in the experiment.

Tags

NGSS.MS-LS1-5