2nd Grade Science : 2nd Grade Science
Study concepts, example questions & explanations for 2nd Grade Science
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Example Questions
Example Question #11 : Animal Effects On Plant Pollination
Hummingbirds pollinate tube-shaped flowers that have nectar and pollen. Their beak picks up pollen from one flower while they feed, and it is dropped into another flower when they move to the next plant to eat.
If humans wanted to use something that mimicked a hummingbird to pollinate their flowers, which item would be the worst?
Paintbrush
Straw
Twig
Sponge
Sponge
The items that would best be used to mimic an animal pollinating a flower would be the paintbrush, twig, or the straw. They would be thin enough to fit into the flower and have the end transfer or pick up the pollen. The sponge would be too broad and would not have the right materials for the dust to stick.
Example Question #12 : Animal Effects On Plant Pollination
Bats are a common pollinator of plants. Many people are afraid of bats and think they are dangerous or even attack people! Bats are very helpful to humans because they help spread pollen from plant to plant. What feature do bats have that help them get from plant to plant to spread pollen?
Ears
Wings
Lungs
Stomach
Wings
Bats fly from plant to plant eatings fruit and picking up pollen as they move. When bats fly, they use their wings. When a bat lands on another plant, some of the powder falls off and is deposited into the stamen of the flower for reproduction. New plants are formed when this pollen is spread, and new seeds form.
Example Question #1 : Diverse Habitats
What can you conclude about plant diversity in the parking lot compared to the park with a lake?
There is less plant diversity in the parking lot than at the park with a lake.
There is not enough information to draw a conclusion.
There is more plant diversity in the parking lot than at the park with a lake.
There is the same amount of plant diversity in the parking lot and the park with a lake.
There is less plant diversity in the parking lot than at the park with a lake.
When comparing the park with a lake to the parking lot, the observations in the data table show readers that there is less plant diversity in the parking lot. The parking lot is human-made, and there are lots of buildings and cement rather than grass and trees like a natural habitat would have.
Example Question #2 : Diverse Habitats
What does the term diverse mean? Example: The rainforest has a diverse population of plants. Many of them can only be found in that location.
Being different, having a great variety
Very few, not many
Strong and muscular
Very delicious or tasty
Being different, having a great variety
The term diverse means to be different or have variety. In the Amazon rainforest, there are about 80,000 species of plants, which shows how many different varieties there are. It is one of the most diverse populations of plants on Earth.
Example Question #1 : Diverse Habitats
The Amazon rainforest has 80,000 species of plants. The ocean has 1 million species of plants. The Sahara desert has 500 plant species.
Which statement is true of these habitats?
All of the habitats have large plant populations and are equally diverse.
All of the habitats have large plant populations, but the rainforest has the most diverse population of the group.
All of the habitats have large plant populations, but the desert has the most diverse population of the group.
All of the habitats have large plant populations, but the ocean has the most diverse population of the group.
All of the habitats have large plant populations, but the ocean has the most diverse population of the group.
These three habitats are very different, and all contain large plant populations. When comparing the diversity or variety of these habitats, the ocean has the more diverse or varied populations of plants. The ocean has 1 million species compared to 500 or 80,000 species.
Example Question #2 : Diverse Habitats
Which habitat shows the most diversity in plant species?
The habitat that shows the most diversity in plant species is the jungle. In the jungle photo, there are multiple plant species shown, whereas the desert, Arctic, and grasslands show many fewer varieties of plants. The Amazon rainforest has 80,000 plant species, whereas the Sahara desert only has 500.
Example Question #5 : Diverse Habitats
There are diverse plant species all over the world, and they vary in each habitat.
True
False
True
The statement is true because plant species are diverse and live in many different habitats around the world. Plants adapt to their environment and are perfectly suited to living in that location. Some habitats feature many species of plants, while others only host a few.
Example Question #1 : Diverse Habitats
Which habitat shows the least diversity in plant species?
The habitat that shows the least diversity in plant species is the Arctic tundra. In the other environments, there are at least one plant species, if not more. The Amazon jungle is home to nearly 80,000 plant species, and forests house a diverse population of plants as well. The grasslands only show one plant species, but depending on the area, there can be more.
Example Question #5 : Diverse Habitats
Which habitat has greater plant diversity? Which piece of the text supports the claim?
- Amazon Rainforest: In the Amazon Rainforest is rains almost every day. There are very tall trees that create a canopy, and the ground of the forest is covered in plants. The plants on the ground try to grow wide or tall to reach sunlight. The very tall trees can block much of the sunlight.
- The Sahara Desert: The Sahara Desert is made entirely of sand. It rarely rains and is very dry. There are only a few plants, and they have small leaves. The sand is scorching and moves every time it is touched; when the wind blows, the sand shifts in all directions.
The Sahara Desert; "The Sahara Desert is made entirely of sand."
The Amazon Rainforest; "...the ground of the forest is covered in plants."
The Sahara Desert; "There are only a few plants, and they have small leaves."
The Amazon Rainforest; "The very tall trees can block much of the sunlight."
The Amazon Rainforest; "...the ground of the forest is covered in plants."
Plant species are diverse and live in many different habitats around the world. Plants adapt to their environment and are ideally suited to living in that location. Some habitats feature many species of plants, while others only host a few. In the two habitats listed the Amazon Rainforest has a great diversity of plants when compared to the Sahara Desert. The text evidence that supports this claim "...the ground of the forest is covered in plants." illudes to many plants being present in the rainforest.
Example Question #4 : Observe Plants To Compare Diversity In Various Habitats
The Sahara Desert: The Sahara Desert is made entirely of sand. It rarely rains and is very dry. There are only a few plants, and they have small leaves. The sand is scorching and moves every time it is touched; when the wind blows, the sand shifts in all directions.
What would the Sahara Desert have only a few plant species?
The desert is made of sand.
It rarely rains and is dry.
All of the answer choices are correct.
The ground is very hot.
All of the answer choices are correct.
The Sahara Desert only has 500 plant species, which may seem like a large amount, but the Amazon Rainforest has nearly 80,000! The reason that the desert has so many fewer plant species and is less diverse is that the ground is scorching, shifts in the wind, is made of sand, and the region receives little to no rain. These conditions make it very difficult for plants to survive unless they are well adapted.
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