Chapter 1 Section 3 Tools Of Life Scientists

Look at page 19 and tell me what the objectives are (What you’ll do) ___________________ ____________________ ___________________

Look at the image to the right. What type of microscope is shown? _____________________ List the parts listed in the book that this microscope has. HINT - This is should have helped you tell which microscope it is. _____________________ _____________________ _____________________

How do electron microscopes work? ___________________ ___________________ Name and describe the two types of electron microscopes mentioned in the book. ________________________________________ ________________________________________

___________ are used to see internal structures of organisms How does a computed tomography scan (CT scans) work? __________________________________________________________________ How does a Magnetic resonance imaging (MRI) work?________________________________________ NOTE **Both Ct scans and MRI provide clearer and more detailed imaging than X-ray The image on the left is a computerized axial tomography scan (CAT scan). The image on the right was made with magnetic resonance imagery (MRI).

Explain how life scientists use computers. ________________________________________ ________________________________________

What was one of the problems associated with standardized units of measurement?_______________________________________ THINK - If you were buying lengths of rope who “feet” would you want to use? Your own or LeBron James’ “feet”? What is the most used form of measurement around the world and with scientists? _______________________________________ What are the most commonly used SI units for the items below: Length ______________________ Volume ______________________ Mass ________________________ Temperature __________________ Metric Rap You Tube 3min

What do the following prefixes mean? Kilo ____________________________________ Deci ___________________________________ Centi __________________________________ Milli ___________________________________ Micro __________________________________ Nano ___________________________________ It is important to use the correct scale of size. What Would you use to measure… A grasshopper? _____________________ A teenage boy? _____________________

Define area. _______________________________ _________________________________________ What is the formula for area? _________________ _________________________________________ What are the units for area called? _____________ For example: m 2, km 2, ft 2 Skip owns a skateboard shop. He would like to replace the wood flooring in the showroom area of his shop. The shop measures 40 ft long by 30 ft wide, how much flooring will he need? Complete math here:

Define volume: ____________________________ _______________________________________ What is the formula to find the volume of a cube (or other rectangular object) ?__________________________ _______________________________________ What is the volume of a fish tank that measures 1.5 m height, 1 m length, and 0.5 m wide? Show work here: What is one way to figure out the volume of an irregularly shaped object? ___________ _______________________

Define mass_____________________________________________________________________ We measure mass on Earth usually by weight soooo mass and weight are often compared HOWEVER! If we moved me (my mass) to the moon where the pull of gravity is less I weigh less but in reality is there less of me? ______________________________ _______________________________________ Define temperature ___________ __________________________ Volume, mass, and weight 1min

Before you conduct a lab always read the_________! Often they come with safety symbols, here are the most common ones label them: Eye Protection Chemical Safety Heating Safety Animal Safety Electric Safety Clothing Protection Plant Safety Sharp Object Hand Safety