7th Science House Party

Observe the food chain above. Which organism’s population would increase if finches were removed from the ecosystem?

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The shortgrass prairie is an ecosystem found in the Great Plains. Many different populations of animals depend on the prairie ecosystem for survival. A typical community includes animals such as snakes, birds, mice, rodents, and insects.

Which food chain most accurately demonstrates the flow of energy in a shortgrass prairie ecosystem shown above?

• Grasshopper → bird → rodent → buffalo

• Hawk → snake → mouse → grasshopper

• Grasshopper → mouse → snake → hawk

• Snake → hawk → skunk → mouse

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Flowers depend on sunlight to make their own food. Butterflies eat nectar from the flowers. Toads eat butterflies. How can the flow of energy in the environment be described?

• Toads provide energy to butterflies

• Nectar provides energy to flowers.

• Flowers provide energy to butterflies.

• Flowers provide energy to the Sun

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Students decided to build their own terrarium so they can study how the physical characteristics of an environment support a community. The terrarium has plants, grass, crickets, water, and a lizard. Order the organisms in the terrarium flow of energy through the food chain?

• grass

• sun

• lizard

• cricket

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The roadrunner is a desert bird that eats fruits and seeds. It also eats insects, spiders, scorpions, and rattlesnakes. What would likely happen if the roadrunner population disappeared from its ecosystem?​ The population of the scorpions would ​ ​ (a)  

• increase
• decrease

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Refer to the above image. A chef is making pecan pralines. He needs to add the butter and vanilla when the sugar mixture reaches 118°C. How many more degrees must the sugar water increase before the chef can add the butter and vanilla? (a)  

• 5°C
• 8°C
• 9°C
• 7°C

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According to the above images, how much did the water increase in temperature from the first picture to the second picture?

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The wall thermometer above shows today’s temperature. Tomorrow’s temperature is forecast to be 5°C colder. ​ ​What will the thermometer most likely look like tomorrow?​ ​ (a)  

• 15
• 5
• 25
• 20

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The wall thermometer above shows the temperature on January 6th. The temperature 6 months later, on July 6th, is 13°C hotter. What is the temperature on July 6th? (a)  

• 28°C
• 2°C
• 21°C
• 9°C

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The thermometer reading in the picture is 

• 41°C

• 45°C

• 39°C

• 35°C