Grade 3 Science - Natural and Built Structures

What is the purpose of a structure?

• To hold a load

• To make a city

• To have rooms

• To look nice

These are examples of built structures:

• tree, rock

• house, beaver dam

• eggshell, nutshell

• seashell, skeleton

What animal builds this structure?

• fish

• otter

• bird

• beaver

What is a harmful environmental impact of a beaver dam?

• the beaver has a home

• the dam can cause flooding

• the beaver eats fish

• the beaver dam makes trees grow

What animal builds this structure?

• birds

• butterfies

• bees

• squirrels

These are examples of human-built structures:

• desk, hotel, rollercoaster

• nest, hive

• seashell, eggshell

These are harmful effects of human building on the environment:

• pollution, deforestation

• places for people to live

• cities grow larger

These are positive effectives of natural structures:

• causing pollution, flooding

• building healthy lakes and streams, providing honey

• overpopulation of animals

• endangering tree species

What type of animal builds this structure?

• Penguin

• Robin

• Turtle

• Wasp

What type of animal build's this structure?

• Squirrel

• Hummingbird

• Human

• Fox