Look-up History
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Show words looked up
Word |
# |
Date |
Definition |
Site |
Level |
| geology |
1 |
today |
the study of the physical structure of the earth and how it has changed over time. Geologists gain this knowledge by studying rocks. Some geologists study other planets. [2 definitions] |
Kids |
Int. |
| endangered species |
1 |
today |
a species of plant or animal that is in danger of becoming extinct. |
Kids |
Int. |
| music |
1 |
today |
sound with tones and rhythm that can be listened to and enjoyed. Music can be made by voices or instruments. [4 definitions] |
Kids |
Int. |
| blood |
1 |
today |
the red liquid containing oxygen and nutrients that pumps through the veins and arteries of humans and many other animals. [2 definitions] |
Kids |
Int. |
| photography |
1 |
today |
the art or practice of taking and making photographs. |
Kids |
Int. |
| invertebrate |
1 |
today |
without a backbone [2 definitions] |
Kids |
Int. |
| mammal |
2 |
today |
a warm-blooded animal with fur or hair on its skin and a skeleton inside its body. Mammal mothers produce milk to feed their babies. Most mammals have four legs or two arms and two legs. Dogs, cows, elephants, mice, whales, and humans are all mammals. |
Kids |
Int. |
| reproduction |
1 |
today |
When animals give birth to new animals like themselves, it is called reproduction. Reproduction is also when plants make new plants like themselves. |
WILD |
WILD |
| measurement |
1 |
today |
the act or process of measuring. [2 definitions] |
Kids |
Int. |
| natural resource |
1 |
today |
materials that are found in nature and that can be used by people in many ways. Fresh water, soil, coal, and forests are all examples of natural resources. |
Kids |
Int. |