2nd Grade Science : Life Science
Study concepts, example questions & explanations for 2nd Grade Science
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Example Questions
Example Question #1 : Investigate Whether Plants Need Sunlight And Water To Grow
Debbie is doing a school project to see if plants must have both water AND sunlight to grow. She decides to put some plants in a window and others in a dark closet. She waters one in the sunshine and one that is in the dark. Debbie wrote down her daily observations and measurements and created a data table to display the information. She concludes that the plants in the window that received water grew the tallest and had the healthiest appearance. Is her conclusion valid based on the information she gathered? What evidence supports her claim?
Debbie's conclusion is invalid. The plant may have grown two inches, but it did not flower or produce fruit, so it cannot be healthy.
There is no way to tell if Debbie's conclusion is valid with the evidence that is provided in the data table.
Debbie's conclusion is valid. The plant in the sunny location that was watered looked green and grew two inches during the investigation.
Debbie's conclusion is partially valid. The plant grew, but it does not appear to be healthy.
Debbie's conclusion is valid. The plant in the sunny location that was watered looked green and grew two inches during the investigation.
Collecting data and making observations during an investigation provides the information necessary to conclude. Based on the information provided, only "Plant 1" received water and sunlight, and it was the only plant that grew and looked healthy. The conclusion that Plant 1 did the best is supported by its appearance and the fact that it survived. Debbie's conclusion is valid. The plant with access to sunshine and water is the most healthy in appearance and the only plant that grew.
Example Question #3 : Investigate Whether Plants Need Sunlight And Water To Grow
Plants can live without sunlight as long as they have water.
False
True
False
The statement in the question is false. Plants cannot live without sunlight, even if they have water available. If plants do not have water or sunlight, they will not survive. Plants need sunlight to make their food and provide them with nutrients to grow. Plants must have water and absorb it through their roots. Water and sunlight are two things plants MUST have to grow and live.
Example Question #11 : Sunlight, Water, And Plant Growth
Susan is investigating whether plants need and sunlight to grow. She experimented, and the data table shows her results. Based on this info, which plant seemed to do the worst and why?
Plant 4; this plant died
Plant 3; this plant had wilted, brown leaves but it didn't die
Plant 1; this plant was green and grew at the end of the investigation
Plant 2; the plant did not grow, but it only had brown shriveled leaves and did not die
Plant 4; this plant died
Collecting data and making observations during an investigation provides the information necessary to conclude. Based on the information provided, "Plant 4" did the worst because it died. "Plants 2 and 3" did not grow and have brown leaves, so they did not do well but are still alive. "Plant 4" had no sunlight or water, so it had none of the necessary elements for growth or survival.
Example Question #5 : Investigate Whether Plants Need Sunlight And Water To Grow
Gary is investigating whether plants need and sunlight to grow. He experimented, and the data table shows his results. Based on this info, what can be concluded about the plants' need for water?
Plants that got both sunlight and water did not grow, and some did not survive.
Plants that got only sunlight did very well and had green leaves.
Plants that did not get water did not grow, and some did not survive.
Plants that got only water did very well and had green leaves.
Plants that did not get water did not grow, and some did not survive.
Collecting data and making observations during an investigation provides the information necessary to conclude. Based on the information provided, only "Plant 1" received water and sunlight, and it was the only plant that grew and looked healthy. "Plants 2 and 4" did not receive water, and they did not grow. "Plant 2" had brown shriveled leaves, and "Plant 4" died. Without water, plants cannot survive.
Example Question #21 : Life Science
What does the term disperse mean? Example: Many animals help disperse the seeds of plants so new offspring can grow.
Stop the movement of
To encourage
Spread over a wide area
Eat something
Spread over a wide area
The term disperses means to spread or distribute over a wide area. Animals spread the seeds of plants over broad areas to help new plants begin their growth. These animals are vital to new plants being formed.
Example Question #22 : Life Science
One way that seeds travel from place to place is through animal poo! Animals eat fruits, vegetables, and plants and then spread the seeds when they exit their bodies. If you were developing a model to mimic this type of animal, which animal would you choose?
Alligator
Bear
Lion
Eagle
Bear
Animals that spread seed through their excrement (or poo) have first to eat fruits, vegetables, or plants with seeds. Lions, eagles, and alligators are carnivores meaning they only eat meat, not plants. They would not pick up seeds through their diet so they cannot spread them through poo. Bears are omnivores meaning they eat plants and meat. Bears would be the type of animal that would spread seeds through their poo.
Example Question #23 : Life Science
One way that animals disperse seeds is by collecting them. Animals like squirrels collect seeds to eat and store them away for later. Many times they bury the seeds and forget about them. They don't realize it, but they just planted a new bush, flower, or tree!
Ami has to design a model that mimics the way a squirrel disperses seeds. What is the most important feature her model must have?
The model must be able to dig.
The model must be able to swim.
The model must be able to fly.
The model must be able to sleep.
The model must be able to dig.
The most crucial feature that Ami's model could have is the ability to dig. Squirrels collect seeds and then dig holes to store the food in until later, so the model must also be able to dig holes. The squirrels forget about the seeds, and plants begin to grow. Digging a hole and placing the seeds underground it something the model should be mimicking.
Example Question #24 : Life Science
Some seeds are hitchhikers, which means they get stuck in an animal's fur and carried away when the animal moves. Coyotes, for example, travel long distances, and they don't even know they are dispersing seeds through the forest as they walk!
If you were making a model that mimicked an animal who carried hitchhikers, which feature would be most important for them to have?
Strong teeth
A tail
Fur or hair
Scales
Fur or hair
If a seed is a hitchhiker, it needs to attach to something to be carried around. If creating a model that mimics an animal that helps with this process, it must have the necessary features. Strong teeth and a tail are not very important to a hitchhiker's attachment or travel. Scales are slick, and the seed would not attach as well to an animal with this type of body covering. Fur or hair would be a more important feature because it gives the seed something to get stuck to so it can be carried around.
Example Question #25 : Life Science
What does the term mimic mean? Example: I built a model to mimic an animal; it can dig just like a dog!
To imitate or copy
To hunt or find
To eat for survival
To play with
To imitate or copy
The term mimic means to copy or imitate someone or something. In the case of the example, the model mimics digging like a dog. This means the model is copying the way a dog can dig and doing it the same way.
Example Question #1 : Develop A Model Mimicking An Animal Dispersing Seeds
Animals disperse (or spread) the seeds of plants they eat. Seeds exit the digestive system of a bat while they are flying around eating fruit from different plants. When the seeds land on the ground, new plants may be formed. How can humans mimic the bat and disperse seeds?
Eat seedless watermelon at a picnic
Roast pumpkin seeds to use in trail mix
Throw seeds out of a car window while driving
Put seeds in a pond in your yard
Throw seeds out of a car window while driving
If humans want to develop a model for mimicking a bat dispersing seeds, the best answer choice would be to throw seeds out of a car window while driving. By tossing the seeds, it gives the change for a new plant to grow when they land in the dirt outside of the car. Humans can create models and devices to mimic animals that help keep new plants growing.
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