Science Units in Second Grade

Life Cycles

Amphibians

The word amphibian means two-lives. Amphibians spend their lives in the water and on land.

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Different types of amphibians.

There are more than 4,000 different kinds of amphibians. Members of this animal class are frogs, toads, salamanders, newts, and caecilians or blindworms.

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Live Cycle of the Ladybird Bettle

The Life Cycle of a Ladybug

The ladybug life cycle is not much different from the life cycle of a butterfly. The ladybug goes through the same four stages as a butterfly, the egg stage, the larvae stage, the pupa stage, and the adult ladybug stage. You know what adult ladybugs look like, but you wouldn’t even recognize them before they get to that final stage of their lives.

- See more at: http://www.ladybug-life-cycle.com/#sthash.QzqMK6Bk.dpuf

Egg Stage

Egg Stage

Ladybug Eggs with some Larvae Newly Hatched

Female ladybugs lay their eggs on the underside of leaves. This is to protect them from being seen by flying predators as well as from the weather. A mother ladybug will lay from ten to fifteen eggs in one place and she will make sure that it is a place where the babies can find food when they hatch. The ladybug eggs look similar to yellow jellybeans, except that they are tiny. The next time you are in the park in springtime, carefully look under some plant leaves and see if you can pick out some ladybug eggs, but don’t touch them because you could kill the babies.

- See more at: http://www.ladybug-life-cycle.com/#sthash.QzqMK6Bk.dpuf

Larvae Stage

Larvae Stage


Once the eggs hatch, the larvae will come out and start looking for something to eat. They will look for tiny mites or aphids and they should find plenty because the mother found the perfect leaf to lay her eggs under because of the abundance of food for the larvae to find. Newborn larvae look sort of like tiny alligators. After only a few days, the larvae will be large enough to begin to molt (shed their skin), and they keep molting for as long as they are growing. You can find the molted skins on leaves if you look very hard.

- See more at: http://www.ladybug-life-cycle.com/#sthash.QzqMK6Bk.dpuf

Pupa Stage

Pupa Stage

After a couple of weeks of growing, the larvae will start to change into something that looks like a shrimp. It will find a leaf to attach itself to and it will seem to fall asleep for a few days, but it is not sleeping at all. During the pupa stage, the larvae are going through a metamorphosis into a ladybug.

- See more at: http://www.ladybug-life-cycle.com/#sthash.QzqMK6Bk.dpuf

Adult Stage

Adult Ladybug Stage

What does a newly emerged ladybug (one that just hatched out of the pupa) look like?
Visit www.ladybuglady.com/NewLadybug.html to see one emerge step by step.



Adult Ladybug

When the metamorphosis is complete, the skin of the larvae will split open and the full grown ladybug will emerge, but it still won’t look like the ladybug that you know so well. It will look soft and pink or very pale for a couple of hours until its shell becomes hard. As the shell hardens it also gains pigment, which causes the ladybug to become bright red.

- See more at: http://www.ladybug-life-cycle.com/#sthash.QzqMK6Bk.dpuf
The Life Cycle of a Ladybug

What do plants need to survive?

Water, Air, Sunlight, Nutrients

Take a look at this! What happens when we water some and not others?

What happens when we do not allow plants the sunlight necessary for life?

The Tiny Seed by Eric Carle
The Needs of a Plant (song for kids about 5 things plants need to live)

What plants do you see in your yard, house, neighborhood?

Created By: Katherine Trant