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26 Cards in this Set
- Front
- Back
An ____________ is a complete living thing.
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organism
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The five characteristics of living things: 1 2 3 4 5
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1)living things grow and develop,
2)living things reproduce, 3) living things respond to their environment, 4)living things use energy, and 5)living things are made of cells |
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The process of birth, growth, reproduction and death is called the __ __ or the life cycle.
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life span
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______ is the first stage of life.
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Birth
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Organisms that reproduce are called _____________.
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parents
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Organisms respond to their environment to: 1) and 2)
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1)to protect themselves and
2)to gain an advantage such as food |
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An important part of responding to the environment is the ability to ______.
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movement or to be able to move
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Plants are respond to the sun by___________________.
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growing towards the light and water
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____________ is the ability to do work.
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energy
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One of the laws of nature states that changing one form of energy to another form of energy is not efficient. Therefore when organisms convert energy from one form to anther, they produce _________.
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waste
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All living things are made of ____.
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cells
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In 1665, __ ____ examined a small piece of cork with a microscope he invented.
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Robert Hooke
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How did Hooke come up with the name "cells" for what he saw?
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When Hooke looked at the dead cork, the cells were empty and he thought they looked like empty chambers.
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______ is the term used to describe the smallest unit of a living organisms.
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cell
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In 1938, two German scientists, ________ and ____________ identified plants and animals cells under the microscope.
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Schwann and Schleiden
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________ is an instrument that uses lenses to magnify objects hundreds or thousands of times.
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microscope
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Many people credit the Dutch inventor _______ with inventing the first microscope.
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Jensen
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___________ was a Dutch scientist created a more powerful microscope he used to study tiny creatures in water.
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Leeuwenhoek
Lee u wen hoek |
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A ___ is a tiny unit of living material surrounded by a thin membrane.
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cell
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Many organisms consist of only one cell; they are called ______.
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unicellular
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Organisms with millions of cells are called ____.
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multicellular
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Multicellular organisms have cells that are ________, or have special jobs.
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specialized
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A group of cells that work together to perform a specific job are called ___.
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tissue
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Tissues that work together to form _______.
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organs
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Organs also work together to form ______________.
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systems
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The _________ is an organ.
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heart
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