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A person begins sweating when their body temperature becomes too high. Which characteristic of life does this demonstrate?
Homeostasis
A student records that a plant is 15 cm tall and has five leaves. What type of information has the student collected?
Observation
A substance is made of only one type of atom. What is the smallest unit that still has the properties of that element?
Atom
Water molecules are attracted to one another. This attraction helps water form droplets and contributes to surface tension.
Cohesion
A scientist uses an instrument to view cells that cannot be seen clearly with the unaided eye. What instrument is being used?
Microscope
A cell breaks down glucose and uses the released energy to power its activities. What characteristic of life is being demonstrated?
Metabolism
A student notices that plants receiving more sunlight appear taller and proposes that sunlight affects plant growth. What is this proposed explanation?
Hypothesis
Two atoms hold electrons together by sharing them. What type of bond connects the atoms?
Covalent Bond
Water sticks to the sides of a glass or to the surface of a plant's tissues. What property of water explains this?
Adhesion
A scientist identifies the smallest structure that can carry out all the basic functions of life. What structure has been identified?
Cell
A bacterium divides and produces two new bacterial cells. Which characteristic of life does this demonstrate?
Reproduction
A student sees dark clouds and predicts that it will rain soon. The rain has not started yet. What type of statement is the student's prediction?
Inference
An atom loses an electron and another atom gains it. What type of bond can form because of the attraction between the resulting opposite charges?
Ionic Bond
A student eats bread and fruit to obtain a quick source of energy. Which type of macromolecule is most associated with this function?
Carbohydrate
A newly discovered organism has DNA but no membrane-bound nucleus. How should its cells be classified?
Prokaryotic Cells
A plant's leaves grow toward a light source. Which characteristic of life does this demonstrate?
Response to Stimuli
A scientist gives plants different amounts of fertilizer and keeps the amount of water the same for every plant. What variable is being intentionally changed?
Independent/Manipulated Variable
The slightly positive hydrogen of one water molecule is attracted to the slightly negative oxygen of another water molecule. What interaction is occurring?
Hydrogen Bond
A molecule contains long chains of fatty acids and is used for long-term energy storage. What type of macromolecule is it?
Lipid
A cell produces large amounts of proteins that will be transported out of the cell. Which organelle is responsible for modifying, sorting, and packaging these proteins?
Golgi Apparatus
Over many generations a population of bacteria becomes better able to survive an antibiotic. What characteristic of life is demonstrated by this change in the population?
Adaptation
A scientist changes the amount of fertilizer and measures the height of each plant after two weeks. What variable is being measured?
Dependent/Responding Variable
A substance such as salt is able to dissolve in water because water molecules interact with its particles. What property of water does this demonstrate?
Universal Solvent
A cell needs molecules that can form structures and act as enzymes. These molecules are built from amino acids. What type of macromolecule is being described?
Protein
A muscle cell requires large amounts of energy because it is constantly contracting. Which organelle would you expect the cell to have in large numbers?
Mitochondria