Science LEAP Practice

Rafflesia plants are found in rain forests in Southeast Asia. Rafflesia flowers look like rotting meat, since they are red with white dots or stripes. Rafflesia flowers also give off a terrible smell like that of dead animals. This is why rafflesia are also called "corpse flowers." A rafflesia flower is shown in Picture 1.

Rafflesia plants do not have leaves, roots, or stalks. Rafflesia plants do not use the Sun to make energy. Instead, rafflesia plants live inside a vine plant named Tetrastigma and get energy and matter from this plant.

A rafflesia plant can be seen only when it blooms. The rafflesia bud pushes through the side of the vine. The bud then develops into the world's largest flower, almost one meter across. The flower's terrible smell attracts pollinators that usually eat rotting meat. After the rafflesia flower is pollinated, it makes berries with tiny seeds. The berries are eaten by small mammals.

​

Some scientists want to know more about how rafflesia plants affect Tetrastigma vines. Which question should the scientists test?

• How does the habitat of the rafflesia plant affect the rate of Tetrastigma growth?

• How does the size of the rafflesia plant affect the amount of air available for Tetrastigma growth?

• How does the color of the rafflesia plant affect the amount of soil the Tetrastigma can use for its growth?

• How does the presence of the rafflesia plant affect the amount of water the Tetrastigma can use for its growth?

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Rafflesia plants are found in rain forests in Southeast Asia. Rafflesia flowers look like rotting meat, since they are red with white dots or stripes. Rafflesia flowers also give off a terrible smell like that of dead animals. This is why rafflesia are also called "corpse flowers." A rafflesia flower is shown in Picture 1.

Rafflesia plants do not have leaves, roots, or stalks. Rafflesia plants do not use the Sun to make energy. Instead, rafflesia plants live inside a vine plant named Tetrastigma and get energy and matter from this plant.

A rafflesia plant can be seen only when it blooms. The rafflesia bud pushes through the side of the vine. The bud then develops into the world's largest flower, almost one meter across. The flower's terrible smell attracts pollinators that usually eat rotting meat. After the rafflesia flower is pollinated, it makes berries with tiny seeds. The berries are eaten by small mammals.

​

Which type of insect will most likely be attracted to rafflesia flowers?

• insects that live on the flowers.

• insects that hunt other insects.

• insects that break down dead animals.

• insects that eat plant stems and leaves.

Rafflesia plants do not provide food for insects that are attracted to their flowers. Why do the insects most likely visit rafflesia flowers?

Refer back to the text:

Rafflesia plants are found in rain forests in Southeast Asia. Rafflesia flowers look like rotting meat, since they are red with white dots or stripes. Rafflesia flowers also give off a terrible smell like that of dead animals. This is why rafflesia are also called "corpse flowers." A rafflesia flower is shown in Picture 1.

Rafflesia plants do not have leaves, roots, or stalks. Rafflesia plants do not use the Sun to make energy. Instead, rafflesia plants live inside a vine plant named Tetrastigma and get energy and matter from this plant.

A rafflesia plant can be seen only when it blooms. The rafflesia bud pushes through the side of the vine. The bud then develops into the world's largest flower, almost one meter across. The flower's terrible smell attracts pollinators that usually eat rotting meat. After the rafflesia flower is pollinated, it makes berries with tiny seeds. The berries are eaten by small mammals.

• The insects are looking for a place to live on the flowers.

• The insects are attracted to the movement of the flowers.

• The insects are following other insects that eat the flowers.

• The insects are attracted to the rotting meat smell from the flowers.

Use the information and your knowledge of science to answer the question.

​The figure shows a pond ecosystem.

Which matter from the ecosystem do water weeds need to get so that they can make food?

• scales from the fish

• water from the pond

• nutrients from the pond mud

• waste materials from the snail

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Use the information and your knowledge of science to answer the question.

​

Daniel was playing with a glow stick and noticed that something inside the glow stick seemed to break when he bent it. He researched how a glow stick works and found this information.

What causes the glow stick to produce light?

• A new material is formed when the glass mixes with Chemical W.

• A new material is formed when the glow stick's temperature changes.

• A new material is formed when Chemical X and Chemical W are shaken.

• A new material is formed when Chemical X mixes with Chemical W.

Tags

NGSS.MS-PS1-2

Part B

​

Which evidence best supports the answer to Part A?

• The glow stick is brighter in cold temperatures.

• The glass capsule is broken and cannot be fixed.

• The glow stick produces light after the two chemicals are mixed.

• The two chemicals are separated inside a solid container.

Tags

NGSS.MS-PS1-2