Fifth Grade Content Vocabulary-sci.

Force is defined as a push or a pull. In the context of physics, force refers to any interaction that can change the motion of an object. It can cause an object to accelerate, decelerate, or change direction. Forces can be exerted by objects or by fields, such as gravitational force or electromagnetic force.

A galaxy is a vast collection of stars. It is a term used in scientific vocabulary to describe a large system of stars, gas, and dust held together by gravity. Galaxies can range in size from small dwarf galaxies to massive galaxies containing billions of stars. They come in different shapes and sizes, such as spiral, elliptical, and irregular galaxies. Galaxies are fundamental units in the study of astronomy and cosmology, and they play a crucial role in understanding the structure and evolution of the universe.

A comet is an object made of ice and dust that follows a long orbit around the sun. Unlike planets, stars, and galaxies, comets are composed of icy material and have a distinctive tail that forms when the sun's heat vaporizes the ice. This definition accurately describes a comet and distinguishes it from the other options.

An eclipse occurs when one object passes between the sun and another object, casting a shadow. During an eclipse, the object that passes in front of the sun blocks its light and creates a shadow on the other object. This can happen with celestial bodies like the moon passing in front of the sun, causing a solar eclipse, or with the Earth passing between the sun and the moon, causing a lunar eclipse.

A star is a huge object in space made up of gas that gives off its own light and heat. Unlike other options such as a galaxy, meteor, or comet, a star is a self-luminous celestial body that generates energy through nuclear fusion in its core. It emits light and heat due to the intense heat and pressure created by this fusion process. Stars are the building blocks of galaxies and can be found in various sizes, colors, and stages of their life cycle.

Acceleration is the correct term that matches the given definition. Acceleration refers to the rate of change in speed or direction, which can include slowing down, speeding up, or changing direction. It is a fundamental concept in physics and is commonly used to describe the motion of objects.

A meteor is a piece of rock from space that enters Earth's atmosphere. It is often referred to as a shooting star when it is seen streaking across the sky. Comets are icy bodies that also come from space but are made up of dust, ice, and gas. Planets are celestial bodies that orbit around a star and do not enter Earth's atmosphere. Galaxies are vast systems of stars, gas, and dust held together by gravity. Therefore, the correct term that matches the given definition is meteor.

A planet is defined as one of the nine objects that revolve around the sun. In our solar system, there are eight planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. These planets are celestial bodies that orbit the sun, have sufficient mass to assume a nearly round shape, and have cleared their orbit of other debris. Moons, comets, and asteroids are also celestial objects, but they have different characteristics and do not fit the definition of a planet.

The definition given matches the term "Volume". Volume refers to the amount of space occupied by an object or substance. It is a measurement of the three-dimensional space that an object or substance occupies. In this context, the other terms listed - Force, Galaxy, and Speed - do not pertain to the amount of space an object or substance takes up.

Velocity is the correct answer because it refers to the speed of an object in a specific direction. Unlike speed, which only measures how fast an object is moving, velocity takes into account the direction of the object's motion. Therefore, velocity is the appropriate term to describe the speed of an object in a certain direction.

Adaptation refers to a physical or behavioral change that helps an organism survive in its environment. It is a process through which organisms adjust to their surroundings in order to increase their chances of survival and reproduction. This can involve changes in physical characteristics, such as camouflage or the ability to withstand extreme temperatures, as well as changes in behavior, such as migration or the development of specialized feeding habits. Adaptations are essential for the survival and success of organisms in their specific habitats.

A gene is a segment of DNA that carries the information needed to determine the inheritance of a particular trait. Genes are responsible for the production of proteins that play a role in various biological processes and traits. They are passed down from parents to offspring and are the basic units of heredity.

The correct answer is "Nucleus" because it is the cell structure that contains the DNA. The nucleus is a membrane-bound organelle found in eukaryotic cells, and it houses the genetic material of the cell in the form of DNA. It plays a crucial role in regulating gene expression and controlling cell activities.

Speed is the correct answer because it is defined as the distance traveled by an object in a given amount of time. It is a scalar quantity that only considers the magnitude of the object's motion and not its direction. Speed can be calculated by dividing the distance traveled by the time taken.

Neap tides are the least extreme tides that occur twice a month during the first and last moon quarter phases. These tides are characterized by a smaller difference between high and low tides. This happens when the gravitational forces of the sun and the moon are perpendicular to each other, resulting in a weaker combined effect on the tides.

A recessive gene refers to a gene in one strand of DNA that is weaker than the corresponding gene in another strand of DNA, resulting in the trait being masked. In genetics, traits are determined by the interaction of genes, and the dominant gene is the one that is expressed or visible, while the recessive gene is only expressed if there are no dominant genes present. Therefore, in this context, the term "recessive" accurately describes the gene that is weaker and masked by the dominant gene.

A dominant gene refers to a gene in one strand of DNA that is stronger or more influential than the corresponding gene in another strand of DNA. It takes over the trait that is passed down in the DNA, meaning that its characteristics or traits are expressed in the organism. This is in contrast to a recessive gene, which is less influential and only expresses its traits when paired with another recessive gene.

A Punnett Square is a table used in genetics to predict the possible traits that offspring will have based on the traits of their parents. It is a visual tool that helps to determine the probability of certain traits being passed on from one generation to the next. The Punnett Square allows scientists to understand and study patterns of inheritance and genetic variations. It is commonly used in biology and genetics research to analyze and predict the outcomes of genetic crosses.

Spring tides occur when the gravitational forces of the moon and the sun align, resulting in the highest high tides and the lowest low tides. These tides happen twice a month, during the full moon and new moon phases. They are called "spring" tides because the water "springs" higher than usual.

The term "Nucleus" is the correct match for the definition "Cell division." Cell division is a process in which a cell divides into two or more daughter cells, and the nucleus plays a crucial role in this process. The nucleus contains the genetic material of the cell, including the chromosomes, which are duplicated and separated during cell division. Therefore, the term "Nucleus" is the most appropriate match for the given definition.

A scientific explanation that describes how some part of the world or universe acts under certain conditions is referred to as a "Law." Laws in science are generalizations or principles that describe a consistent pattern or behavior observed in nature. They are based on repeated observations and experiments and are considered to be fundamental and universal. Laws help scientists understand and predict the behavior of natural phenomena and are an important part of scientific knowledge and understanding.

Tropism is the correct answer because it refers to plant growth in response to a stimulus, such as growing towards light. This is a common phenomenon observed in plants, where they adjust their growth direction based on the presence and direction of light. Tropism plays a crucial role in helping plants maximize their exposure to sunlight for photosynthesis and overall growth.