PreAlgebra 1.1
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- Blue whales eat approximately 4 tons of food per day during their summer feeding season. - To calculate how many tons of food a blue whale eats over a given number of days, you multiply the number of days by 4. - For example, a blue whale would eat about 480 tons of food over a 120 day period.
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3) Cell cycle progression is regulated by both internal and external signals, such as cyclins and growth factors, to ensure DNA replication and cell division occur at the proper times.
Chapter48
Three biogeochemical cycles are the carbon cycle, nitrogen cycle, and phosphorus cycle. They are called biogeochemical cycles because they involve the movement of chemical elements between biotic (living) and abiotic (non-living) parts of ecosystems. A water molecule could travel through the hydrologic cycle by evaporating from bodies of water into the atmosphere and condensing to form clouds, then falling as precipitation and running into streams or soaking into the ground.
Chemicalreactions
This document provides an overview of chemical reactions, including:
- A chemical reaction occurs when reactants are converted into products.
- Lavoisier established the law of conservation of mass through experiments showing reactants and products have the same total mass.
- Chemical equations represent reactions using formulas and can be balanced to show equal numbers of atoms on each side.
- There are several types of chemical reactions including synthesis, decomposition, and oxidation-reduction.
- Reactions can release or absorb energy in different forms like heat or light. Catalysts increase reaction rates without being used up.
Bonding
The document summarizes properties and bonding of various groups of elements from the periodic table. It discusses how metals are good conductors of heat and electricity, and have properties like malleability and luster. It describes metallic bonding and how it allows metals to be shaped without breaking. It then covers the specific properties and uses of groups like the alkali metals, alkaline earth metals, and transition metals. It also summarizes the properties of nonmetals.
Ecology of populations
This document summarizes key concepts in population ecology, including:
1) Population density refers to the number of individuals per unit area, while distribution refers to where individuals are located. Limiting factors restrict population size and distribution.
2) Intrinsic rate of natural increase describes population growth based on birth and death rates. Exponential growth occurs with unlimited resources, while logistic growth slows as resources diminish.
3) Life history patterns vary based on environmental stability - r-selected species thrive in unstable environments with many offspring, while K-selected species in stable environments have few offspring and parental care.
Ecology introduction
Ecology is the study of interactions between organisms and their environment. It examines how living things affect each other and the world they inhabit. Ecologists study these interactions across different levels of organization, from individual organisms and populations, to biological communities within ecosystems, and finally the biosphere - the global region that supports life. Abiotic factors like temperature and biotic factors such as other living things both shape organisms and their development.
Animal behavior
This document summarizes key concepts in animal behavior and its evolutionary basis. It discusses how behaviors are observable responses to stimuli and their survival value. Genetic and environmental factors influence behavior as shown by twin studies. Behaviors like fixed action patterns and learning through classical and operant conditioning provide evolutionary advantages. Imprinting and imitation also aid learning. Sexual selection and sexual dimorphism and behaviors like territoriality and communication help reproduction and survival. Sociobiology examines how social behaviors evolve. Altruism can increase indirect fitness in societies where costs are outweighed by benefits like protection and resources. Honeybee societies demonstrate genetic relationships maintaining cooperation.
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みなさんこんにちはこれ何文字まで入るの？40文字以下不可とか本当に意味わからないけどこれ限界文字数書いてないからマジでやばい文字数いけるんじゃないの？えこ...
ここ3000字までしか入らないけどタイトルの方がたくさん文字入ると思います。
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みなさんこんにちはこれ何文字まで入るの？40文字以下不可とか本当に意味わからないけどこれ限界文字数書いてないからマジでやばい文字数いけるんじゃないの？えこ...
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PreAlgebra 1.1
- 1. Blue Whales During its summer feeding season, a blue whale eats about 4 tons of food every day. To find about how many tons of food a blue whale eats in a given number of days, you can multiply the number of days by 4 , as shown in the table. Expressions and Variables 4 • d d 4 • 10 10 4 • 2 2 4 • 1 1 Tons of food eaten Days 1.1 LESSON
- 2. A numerical expression consists of numbers and operations. In the table, the expression 4 • 10 is a numerical expression. It can also be written as 4 10 or 4 ( 10 ). Expressions and Variables 1.1 LESSON
- 3. A variable is a letter used to represent one or more numbers. A variable expression consists of numbers, variables, and operations. A numerical expression consists of numbers and operations. In the table, the expression 4 • 10 is a numerical expression. It can also be written as 4 10 or 4 ( 10 ). Expressions and Variables 1.1 LESSON
- 4. A numerical expression consists of numbers and operations. In the table, the expression 4 • 10 is a numerical expression. It can also be written as 4 10 or 4 ( 10 ). To evaluate a variable expression, substitute a number for each variable and evaluate the resulting numerical expression. A variable is a letter used to represent one or more numbers. A variable expression consists of numbers, variables, and operations. Expressions and Variables 1.1 LESSON
- 5. Evaluating a Variable Expression = 480 ANSWER A blue whale eats about 480 tons of food in 120 days. Multiply. SOLUTION 4 • d = 4 • 120 Substitute 120 for d . Evaluate the expression 4 • d when d = 120 to find out about how many tons of food a blue whale eats in a feeding season of 120 days. EXAMPLE 1 Expressions and Variables 1.1 LESSON
- 6. Study Strategy When you write a variable expression involving multiplication, avoid using the symbol . It may be confused with the variable x . Expressions and Variables 1.1 LESSON
- 7. Evaluating Expressions with Two Variables Evaluate the expression when x = 10 and y = 4 . x + y = Substitute 10 for x and 4 for y . = 14 10 + 4 Add. EXAMPLE 2 Expressions and Variables 1.1 LESSON
- 8. Evaluating Expressions with Two Variables Evaluate the expression when x = 10 and y = 4 . Substitute 10 for x and 4 for y . x y = Substitute 10 for x and 4 for y . = 40 10 ( 4 ) Add. Multiply. x + y = = 14 10 + 4 EXAMPLE 2 Expressions and Variables 1.1 LESSON
- 9. Writing Variable Expressions You can solve a real-world problem by creating a verbal model and using it to write a variable expression. A verbal model describes a problem using words as labels and using math symbols to relate the words. The table shows common words and phrases that indicate mathematical operations. Expressions and Variables divided by divided into the quotient of Division times the product of multiplied by of Multiplication Common Words and Phrases that Indicate Operations minus the difference of decreased by fewer than less than subtracted from plus the sum of increased by total more than added to Subtraction Addition 1.1 LESSON
- 10. Evaluating a Variable Expression Baseball You plan to divide the 120 players in a baseball league into teams with the same number of players. Use a verbal model to write a variable expression for the number of teams if you know the number of players on each team. = 120 p ANSWER SOLUTION Let p represent the number of players on each team. The word divide indicates division. EXAMPLE 3 Expressions and Variables Number of teams = Number of players in league Number of players on each team The number of teams is 120 p , or . 120 p 1.1 LESSON