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Unit 1: The Scientific Method El Método Científico
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What are the steps?! ¿Cuáles son los pasos?
The Scientific Method - El Método Científico State the problem - Indique el problema Ask a question - Haz una pregunta Form a hypothesis - Formar una hipótesis Design an experiment - Diseñar un experimento Collect data/results - Recoger datos / resultados Draw a conclusion - conclusión
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What’s a hypothesis?! ¿Qué es una hipótesis?!
Hypothesis - A prediction, an educated guess, a possible answer to the question. Predicción, conjetura, respuesta posible.
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What’s a hypothesis?! ¿Qué es una hipótesis?!
Make a hypothesis for this question. Haz una hipótesis para esta pregunta. Can a whale hear, how do you know? ¿Puede oír una ballena? Si es así, ¿cómo lo sabes? Was your hypothesis accepted or rejected?
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Variables Dependent (dependiente) variable – variable that responds to the independent one. Variable que responde a la independiente Independent (independiente) variable – variable that you control. variable que usted tiene control What are the dependent and independent variables in the whale hypothesis? ¿Cuáles son las variables dependientes e independientes en la hipótesis?
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Experimental Variables
Dependent variable is the factor in an experiment that a scientist wants to observe, which may change because of the manipulated variable; also known as a responding variable. Independent variable is the factor in an experiment that a scientist purposely changes. Control group is the factor or factors in an experiment that the scientist purposely keeps the same.
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Controlled Experiment
There are at least 2 groups, one of which does not receive the experimental treatment. Allows a scientist to test a single variable at a time.
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Collecting Data Two types of data.
Quantitative: numerical data, a number (Quantity) 2. Qualitative: written observations, words (Quality)
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Drawing a Conclusion The Last Step Inference: A logical interpretation based on your prior knowledge. (to infer)
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Inference a conclusion reached on the basis of evidence and reasoning.
the process of inferring something.
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Hypothesis vs. Theory Hipótesis vs. Teoría
Hypothesis is an educated guess. Hipótesis es una conjectura. A theory is an idea well supported with evidence. La teoría es una hipótesis bien apoyado. Tiene pruebas. Like the theory of plate tectonics. Al igual que la teoría de la tectónica de placas. We know it to be accepted because of all the supporting evidence. Sabemos que es verdad, porque de todos las pruebas de apoyo.
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Theory vs. Law Teoría vs Ley
A theory is well supported with evidence. La teoría es una hipótesis bien apoyado. Tiene pruebas. A law is constant. Under the right conditions it will have the same results every time. Una ley es constante, no importa qué. En determinadas condiciones, tendrá los mismos resultados cada vez. For example the law of motion – for every force there is equal and opposite force. Por ejemplo, la ley del movimiento - por cada fuerza existe fuerza igual y opuesta.
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Scientific Principles los principios científicos
Principles explain the ‘why’ and ‘how’ of certain phenomena. Principios explicar el "por qué" y "cómo" de ciertos fenómenos.
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What makes a living thing, living? Que hace que un ser vivo de estar?
IMAGINE …. Imaginar You’re an astronaut, on Mars. You find a “thing” and aren’t sure if it is ALIVE or not. How do you figure it out? What do you do? Eres un astronauta, en Marte. Usted encontrara una “cosa” y no esta seguro de si esta vivo o no. Como te diste cuenta? Discuss with your group, make a list of ideas.
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Biology is …. The Study of Life
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Reproduce ALL living things can reproduce.
Asexual reproduction = one parent copies itself (identical) Sexual reproduction = two parents combine genetic information to make new individual
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(have) Adaptations & Evolve
Taken as a group ALL living things change over time. Evolution: Change in a species over generations of time.
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Respond (to stimuli) ALL living things respond to their environment.
Stimulus: something that causes a reaction or response from a living thing Living things respond to stimuli
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(need) Energy ALL living things obtain and use energy!
Metabolism: The chemical reactions through which an organism builds up or breaks down materials for energy. Breakdown of food and water for energy.
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(maintain) Homeostasis
ALL living things maintain a stable internal environment. Homeostasis: regulation of an organisms internal environment. Examples: Body temperature, water content and blood sugar regulation.
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(are) Organized ALL living things are made up of cells!
Multicellular = many cells Unicellular = one cell Two types of Cells Prokaryote (bacteria) Small, unicellular Eukaryote (animals/plants) Large, multicelular
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Grow & Develop ALL living things can grow in size and develop or mature into adult form.
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Genetic Code ALL living things have DNA. A universal genetic code.
Code for genes (traits) Made of 4 base pairs Adenine Thymine Guanine Cytosine
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Biological Levels of Organization Niveles Biológicos de la Organización
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Levels of Biological Organization
From Smallest to Largest – Desde pequenas a grandes 1. Atoms 2. Molecules 3. Organelles 4. Cells 5.Tissue 6.Organs 7.Organ Systems 8. Organisms
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Textbook Page 896 Section 35 – 1 Assessment 1, 2 and 4
Then make a poster . Draw the levels of organization in living things and order them by level smallest to largest (8 levels in all). Hacer un cartel. Dibuja los niveles de organizacion y etiquetarlos. Textbook chapters 2, 7 and 35 can help you.
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