Chapter 1 Review What is Life?

Unicellular organisms are composed of ________ cell(s). one

Name the 5 of the characteristics of living things Cellular organization, chemicals of life, use energy, respond to their surroundings, grow and develop, reproduce, have life spans

Name 2 of the chemicals of life Carbohydrates, water, proteins and lipids, nucleic acids.

All organisms will die one day All organisms will die one day. This means they have a ____________________ Life span

What is the basic unit of structure and function of an organism? cell

What is the theory that living things arise from nonliving sources? Spontaneous generation

What is the first step of the scientific method? observation

What was Redi’s hypothesis? Maggots do not come from meat

What did pasteur observe? Bacteria grew in broth.

Describe Redi’s experiment… He placed meat in two jars and covered one with cloth.

Describe pasteur’s experiment… He placed broth in two flasks and boiled one.

What are the four basic needs of living things? Food, water, living space, and homeostasis

What is water good for? Name 2. To obtain chemicals from their surroundings Break down food Needed to grow and reproduce Moves substances within an organism Has the ability to dissolve more chemicals than any other substance

When two tests are carried out that are identical in every manner but one, it is a ______________________. Controlled experiment

Organisms that can make their own food. autotroph

Organisms that cannot make their own food. heterotroph

What is homeostasis? The maintenance of stable internal conditions.

Ancient earth’s atmosphere was composed of what gases? Nitrogen, water vapor, carbon dioxide, methane

Earliest life forms appeared between ____________ billion years ago.

Did the first life forms need oxygen? no

Did the first life forms have many cells? no

Did the first life forms live in the ocean? yes

What was the scientist name who tried to model conditions on early earth? Stanley Miller

Why was the development of autotrophs on early earth necessary They produced oxygen as a waste product

What is the metric unit for volume? liter

What is used to measure volume? Graduated cylider

What is the unit for mass gram

Convert 78g = _____kg .078 kg

Convert 78g = _____mg 78,000 mg

Convert 376 mL = _____L 0.376 L

Convert 847,300,000 mm = _____m 847,300 m

Convert 847,300 m = _____km 847.3 km

Study from your notes Vocabulary 7 Characteristics of Living Things Biogenesis Redi Pasteur Be able to apply the scientific method to their experiments 4 Basic Needs of Living Things Metric units study the chart Be able to make conversions

Study from your notes Origin of Life Atmosphere of Ancient Earth compared with Earth today 4 Hypotheses about the first life forms Miller and Urey’s experiment Why was the development of autotrophs important