Physiology

Strap on your shoes and join Mr.

Flowering plants, cone-bearing plants, ferns, and mosses make up the four main plant groups.

Carbon is everywhere.

Which works better to haul a pumpkin-a lever or wheels and axles?

Which makes it easier to lift a large toy-a wedge or wheels and axles?

Is it easier to move ice with a lever or a screw?

Is it easier to lift a bag full of toys with an inclined plane or a pulley?

These kids are playing a game, trying to move a person with a simple machine.

Is it easier to move heavy box with an inclined plane or wheels and axles?

The octopus spies a nice, tasty mantis shrimp.

Team up with Ackerley the Acanthostega to travel back 66 million years to the Tertiary and Quaternary periods of prehistoric Earth, when mammals came to dominate the planet.

Come along with Ackerley the Acanthostega to visit the Triassic and Jurassic periods, 203-145 million years ago.

Join Ackerley the Acanthostega and travel back in time 4,500 million years to the Precambrian period, when our planet first formed.

Follow Ackerley the Acanthostega through the Cretaceous period, 145 to 66 million years ago, when the mightiest dinosaurs stalked the planet.

What animal was here?

Have you ever solved a tricky puzzle?

Have you ever built a cool science project?

Have you ever wondered how the universe began?

How did our knowledge of matter, gravity, and electricity develop over time?

How did our knowledge of cells, heredity, evolution, ecosystems, and photosynthesis develop?

Sunlight, air, water, and minerals help keep plants alive.

A plant can form fruit and seeds when it is pollinated.

Plants have roots, stems, leaves, and sometimes flowers.

Roots help keep plants alive.

Some flowers are able to produce seeds or fruit without getting pollen from another plant.

The flower is the part of a plant that makes seeds or fruit.

Many insects drink nectar and collect pollen from flowers, and in the process they help plants reproduce.

Some plants need to have pollen spread from one plant to another flower in order to reproduce.

Many plants depend on animals to help move pollen around so that the plants can reproduce.

After the 1986 Chernobyl nuclear explosion in Ukraine, scientists believed radiation had created a vast and barren wasteland in which life could never resurface.

The octopus spies a nice, tasty mantis shrimp.

What animal was here?

Does the universe circle around Earth?

Do your eyes send out light like headlights?

Do bulls get angry when they see the color red?

Robots help us understand our universe.

Crackle!

What would you be if your finger bones grew so long that they reached your feet?

A leaf is a leaf, a bit of a tree.

Honeybees are a crucial part of our food chain.

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Could life have previously flourished on Mars?

Seeing brightly colored flowers, hearing nuts go "e;crunch,"e; and feeling cold ice cream on your tongue-we use our senses to explore the world.

Have you ever stared into the night sky, full of stars and planets?

Pouring juice, freezing it, and adding craft sticks are all part of making popsicles.

Putting kernels in a pot, heating them, and adding salt are all part of making popcorn.

Mixing milk, vanilla, and sugar are all part of making ice cream.

Mixing, cooking, and adding salt and pepper are all part of making scrambled eggs.

Heating, melting, and cutting string for a wick are all part of making a candle.

Mixing, pouring, and frosting are all part of making a cake.